CN106290000A - A kind of sample for measuring high temperature fracture toughness and preparation method thereof - Google Patents
A kind of sample for measuring high temperature fracture toughness and preparation method thereof Download PDFInfo
- Publication number
- CN106290000A CN106290000A CN201610749501.9A CN201610749501A CN106290000A CN 106290000 A CN106290000 A CN 106290000A CN 201610749501 A CN201610749501 A CN 201610749501A CN 106290000 A CN106290000 A CN 106290000A
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- China
- Prior art keywords
- knife
- sample
- edge
- high temperature
- cutting groove
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2873—Cutting or cleaving
Abstract
The present invention relates to a kind of sample for measuring high temperature fracture toughness and preparation method thereof, including left end, sample body jaggy is set, the left part of sample body connects the additional edge of a knife, and the additional edge of a knife arranges wired cutting groove, and line cutting groove runs through the additional edge of a knife and connection breach；The upper side edge of line cutting groove and lower side connect positioning baffle respectively, form T-type structure；Positioning baffle is oppositely arranged and middle part is respectively provided with edge of a knife locating slot.The invention provides a kind of compact tensile specimen that can be used in testing Fracture of Metal Material tough test under hot conditions, by arranging line cutting groove, it is simple to mate with high temperature CO D rule clamping；By arranging edge of a knife locating slot, prevent the rule sliding of high temperature CO D from even skidding off and cause test not accurate or failure；Owing to the additional edge of a knife and sample are integrated processing, not depositing assembly problem before the test, sample the most of the present invention is more convenient for upper machine clamping simultaneously ensure its clamping precision, the final accuracy ensureing its test and effectiveness.
Description
[technical field]
The present invention relates to testing of materials field, be specifically related to a kind of sample for measuring high temperature fracture toughness and preparation thereof
Method.
[background technology]
At present, the sample of domestic and international high temperature fracture tough test generally uses following two form:
(1) without the sample of COD predetermined bits device.This kind of sample in test direct clamping infinite place.In process of the test easily
Occurring that COD rule sliding even skids off causes test not accurate or failure；
(2) there is the sample of COD predetermined bits device.Positioning baffle is fixed on sample by clamp-screw, prepared by this kind of sample
Sample to be processed two screwed holes, and additionally two positioning baffles of processing, with clamp-screw, positioning baffle is fixed on examination
On sample, and clamp-screw at high temperature easy-sintering, cause screw and baffle plate only to limit first use.Sample preparation is loaded down with trivial details, by
In there is screwed hole position error, positioning baffle mismachining tolerance, rigging error, after causing clamping COD rule, positioning precision is low, impact
Experimental accuracy.
[summary of the invention]
It is an object of the invention to overcome problems of the prior art, it is provided that one is used for measuring high temperature fracture toughness
Sample and preparation method thereof, the sample prepared can be used in measuring high temperature fracture toughness, is beneficial to improve accurate testing.
In order to achieve the above object, the present invention adopts the following technical scheme that
Arranging sample body jaggy including left end, the left part of sample body connects the additional edge of a knife, on the additional edge of a knife
Arranging wired cutting groove, line cutting groove runs through the additional edge of a knife and connection breach；Upper side edge and the lower side of line cutting groove connect respectively
Connect positioning baffle, form T-type structure；Positioning baffle is oppositely arranged and middle part is respectively provided with edge of a knife locating slot.
Further, edge of a knife locating slot is circular arc.
Further, the distance of center circle of two edge of a knife locating slots is the test gauge length of COD rule.
Further, distance d1 between positioning baffle is more than the distance of center circle of two edge of a knife locating slots.
Further, the rounded vertex distance of two edge of a knife locating slots is less than line cutting groove bottom width d2.
Further, sample body and the additional edge of a knife are integral type structure；Positioning baffle and the additional edge of a knife are also integral type
Structure.
Further, auxiliary partition line is carved with in the junction of sample body and the additional edge of a knife.
Preparation method of the present invention adopts the following technical scheme that and comprises the following steps:
A) blank processing sample body and the additional edge of a knife being connected with sample body are first selected；Sample body is compact
Tensile sample；
B) on the additional edge of a knife, processing runs through the T-shaped line cutting groove of the additional edge of a knife, simultaneously processing and line on sample body
The breach that the T-shaped beam of cutting groove is connected；
C) line cutting groove is the positioning baffle relative by two and the additional edge of a knife is connected to form, in the middle part of positioning baffle
Edge of a knife locating slot is not set, obtains the sample for measuring high temperature fracture toughness.
Further, step b) first portrays auxiliary partition line in the junction of sample body and the additional edge of a knife, reprocessing
Line cutting groove and breach, and auxiliary partition line separator bar cutting groove and breach.
Compared with prior art, the present invention has a following useful technique effect:
The invention provides a kind of compact tension specimen that can be used in testing Fracture of Metal Material tough test under hot conditions
Sample, by arranging line cutting groove, it is simple to mates with high temperature CO D rule clamping；By arranging edge of a knife locating slot, prevent high temperature CO D
Rule sliding even skids off and causes test not accurate or failure；Owing to the additional edge of a knife and sample are integrated processing, do not deposit before the test
Assembly problem, sample the most of the present invention is more convenient for upper machine clamping simultaneously ensure its clamping precision, final essence ensureing its test
Parasexuality and effectiveness.
Further, in the present invention, edge of a knife locating slot is circular arc, it is simple to be stuck in attached by the cylindrical quartz bar that COD advises
Add on the edge of a knife, prevent COD rule from sliding in process of the test, cause result of the test not accurate or failure.
Further, in the present invention, distance d1 between positioning baffle is more than the distance of center circle of two edge of a knife locating slots, prevents
The column type quartz rod of COD rule is stuck in two edge of a knife locating slots without deviating from causing damage when sample is broken.
Further, in the present invention, the rounded vertex distance of two edge of a knife locating slots is less than d2, reduces COD rule and sample
Contact area.
Further, the present invention is by arranging auxiliary partition line, it is simple to determine the processing thickness of line cutting groove.
Processing technique of the present invention simplifies, and reduces production cost and improves production efficiency.
[accompanying drawing explanation]
Fig. 1 is the front view of the present invention；
Fig. 2 is the side view of the present invention；
Fig. 3 is the matching relationship of the present invention and COD rule.
Wherein, 1-auxiliary partition line；2-sample body；The additional edge of a knife of 3-；4-edge of a knife locating slot；5-line cutting groove；6-COD
Rule；7-sample.
[detailed description of the invention]
Below in conjunction with the accompanying drawings the present invention is described in further details.
With reference to Fig. 1, Fig. 2 and Fig. 3, sample 7 of the present invention includes that sample body 2, the left end of sample body 2 are provided with breach,
Breach runs through both sides before and after sample body 2, and in the both sides up and down of breach, sample body 2 is respectively provided with the through hole of symmetry.
The present invention is to define upper inferior direction, left and right shown in Fig. 1, i.e. with the one end at breach place in sample body 2 as a left side
End, only for more clearly describing the present invention rather than limitation of the invention.
Left end front side portion at sample body 2 arranges auxiliary partition line 1, in the left side of auxiliary partition line 1, and sample body 2
Left end be wholely set the additional edge of a knife 3, the additional edge of a knife 3 is processed wired cutting groove 5, line cutting groove 5 is positioned at sample body 2
Left part and run through the additional edge of a knife 3, line cutting groove 5 breach that arrange internal with sample body 2 is connected；Line cutting groove 5 left end
Upper side edge be wholely set relative positioning baffle at lower side respectively, a left side for the left surface of positioning baffle and the additional edge of a knife 3
Side flushes, and positioning baffle is parallel with the left side of sample body 2, and line cutting groove 5 is to be formed by positioning baffle and the additional edge of a knife 3
T-type structure；The middle part of positioning baffle is respectively provided with relative circular arc edge of a knife locating slot 4, it is simple to by the circle of high temperature CO D rule 6
Cylindricality quartz rod is stuck on the additional edge of a knife 3, prevents high temperature CO D rule 6 from sliding in process of the test, cause result of the test precisely or
Failure；The distance of center circle of two circular arc edge of a knife locating slots 4 is the test gauge length of high temperature CO D rule 6, distance d1 between positioning baffle
More than the distance of center circle of two circular arc edge of a knife locating slots 4, purpose is in order to prevent the column type quartz rod of high temperature CO D rule 6 at sample
Two circular arc edge of a knife locating slots 4 it are stuck in without deviating from causing damage when breaking；Two circular arc edge of a knife locating slot 4 rounded vertex
Distance, less than line cutting groove 5 bottom width d2, its purpose is to the contact area reducing high temperature CO D rule 6 with sample 7, makes cutter
Mouthful locating slot 4 and high temperature CO D rule 6 close contact, thus recording high temperature CO D rule 6 displacement of dehiscing is edge of a knife locating slot 4 distance of center circle
Displacement, to guarantee the accuracy of test result；The present invention is by arranging line cutting groove 5, it is simple to advises 6 clampings with high temperature CO D and mates.
In the present invention, auxiliary partition line 1 flushes with the bottom of line cutting groove 5, it is simple to determine the processing thickness of line cutting groove 5.
Sample body 2 uses the compact tensile specimen of American Standard.The present invention makes fracture toughness sample be easy to upper machine clamping and ensure it simultaneously
Clamping precision, the final accuracy ensureing its test and effectiveness.
The preparation method of sample of the present invention comprises the following steps:
(1) blank；First blank is selected；
(2) line cutting profile；Blank is processed into have certain allowance sample body 2 and with sample body 2
The additional edge of a knife 3 being connected；Sample body 2 is compact tensile specimen；
(3) plane leading flank and trailing flank；
(4) mill front and back sides, upper and lower side and left and right side；
(5) bore hole is bored；Boring；
(6) processing line cutting groove 5；The additional edge of a knife 3 is processed T-shaped line cutting groove 5, adds on sample body 2 simultaneously
The breach that work is connected with the T-shaped beam of line cutting groove 5；Line cutting groove 5 is the positioning baffle relative by two and the additional edge of a knife 3 phase
Even formed, be respectively provided with edge of a knife locating slot 4 at the middle part of positioning baffle, obtain the sample for measuring high temperature fracture toughness.
(7) sample 7 dimension control, it is judged that test 7 is the most qualified.
Fracture toughness sample of the present invention uses integrated machine to add the location of non-threaded assembling on the additional edge of a knife 3 and line cutting groove 5
, there is not rigging error in baffle plate, after clamping high temperature CO D rule 6, positioning precision improves, and test data exact correspondence is good and attached
Add the edge of a knife 3 to have edge of a knife locating slot 4 to prevent high temperature CO D from advising 6 slidings even to skid off and cause test not precisely or failure.And processing technique
Simplify, reduce production cost and improve production efficiency.
Claims (9)
1. the sample being used for measuring high temperature fracture toughness, it is characterised in that: include that left end arranges sample body jaggy
(2), the left part of sample body (2) connects the additional edge of a knife (3), and the additional edge of a knife (3) arranges wired cutting groove (5), and line cuts
Groove (5) runs through the additional edge of a knife (3) and connection breach；Upper side edge and the lower side of line cutting groove (5) connect positioning baffle, shape respectively
Become T-type structure；Positioning baffle is oppositely arranged and middle part is respectively provided with edge of a knife locating slot (4).
A kind of sample for measuring high temperature fracture toughness the most according to claim 1, it is characterised in that: edge of a knife locating slot
(4) it is circular arc.
A kind of sample for measuring high temperature fracture toughness the most according to claim 2, it is characterised in that: two edges of a knife are fixed
The distance of center circle of position groove (4) is the test gauge length of COD rule (6).
A kind of sample for measuring high temperature fracture toughness the most according to claim 2, it is characterised in that: positioning baffle it
Between distance d1 more than the distance of center circle of two edge of a knife locating slots (4).
A kind of sample for measuring high temperature fracture toughness the most according to claim 2, it is characterised in that: two edges of a knife are fixed
The rounded vertex distance of position groove (4) is less than line cutting groove (5) bottom width d2.
A kind of sample for measuring high temperature fracture toughness the most according to claim 1, it is characterised in that: sample body
And the additional edge of a knife (3) is integral type structure (2)；Positioning baffle and the additional edge of a knife (3) are also integral type structure.
A kind of sample for measuring high temperature fracture toughness the most according to claim 6, it is characterised in that: sample body
And auxiliary partition line (1) is carved with in the junction of the additional edge of a knife (3) (2).
8. the preparation method being used for measuring the sample of high temperature fracture toughness, it is characterised in that: comprise the following steps:
A) blank processing sample body (2) and the additional edge of a knife (3) being connected with sample body (2) are first selected；Sample body
(2) it is compact tensile specimen；
B) the T-shaped line cutting groove (5) of the additional edge of a knife (3) is run through in the upper processing of the additional edge of a knife (3), simultaneously on sample body (2)
The breach that processing is connected with the T-shaped beam of line cutting groove (5)；
C) line cutting groove (5) is the positioning baffle relative by two and the additional edge of a knife (3) is connected to form, at the middle part of positioning baffle
It is respectively provided with edge of a knife locating slot (4), obtains the sample for measuring high temperature fracture toughness.
The preparation method of a kind of sample for measuring high temperature fracture toughness the most according to claim 8, it is characterised in that:
Step b) first portrays in the junction of sample body (2) and the additional edge of a knife (3) auxiliary partition line (1), reprocesses line cutting groove
And breach, and auxiliary partition line (1) separator bar cutting groove (5) and breach (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610749501.9A CN106290000A (en) | 2016-08-26 | 2016-08-26 | A kind of sample for measuring high temperature fracture toughness and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610749501.9A CN106290000A (en) | 2016-08-26 | 2016-08-26 | A kind of sample for measuring high temperature fracture toughness and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106290000A true CN106290000A (en) | 2017-01-04 |
Family
ID=57676816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610749501.9A Pending CN106290000A (en) | 2016-08-26 | 2016-08-26 | A kind of sample for measuring high temperature fracture toughness and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106290000A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916686A (en) * | 2019-04-04 | 2019-06-21 | 上海交通大学 | A kind of test sample of the anisotropy breaking strength of sheet metal |
Citations (5)
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|---|---|---|---|---|
| CN2160900Y (en) * | 1993-02-18 | 1994-04-06 | 北京有色金属研究总院 | High-linearity large-range E-shaped clamp type stressometer |
| JP2005172641A (en) * | 2003-12-12 | 2005-06-30 | Mitsubishi Heavy Ind Ltd | Monitoring test piece of reactor pressure vessel and method for monitoring/evaluating degradation status |
| CN102564844A (en) * | 2011-12-30 | 2012-07-11 | 中国船舶重工集团公司第七二五研究所 | Method for measuring compact tension specimen fracture parameters by using double extensometers |
| CN104535410A (en) * | 2014-11-24 | 2015-04-22 | 中国航空工业集团公司北京航空材料研究院 | Temperature compensation method used for compact tension sample high temperature crack expansion test |
| CN105136531A (en) * | 2015-07-23 | 2015-12-09 | 成都航天龙宇质检技术有限公司 | Compact tensile sample used in material performance test |
-
2016
- 2016-08-26 CN CN201610749501.9A patent/CN106290000A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2160900Y (en) * | 1993-02-18 | 1994-04-06 | 北京有色金属研究总院 | High-linearity large-range E-shaped clamp type stressometer |
| JP2005172641A (en) * | 2003-12-12 | 2005-06-30 | Mitsubishi Heavy Ind Ltd | Monitoring test piece of reactor pressure vessel and method for monitoring/evaluating degradation status |
| CN102564844A (en) * | 2011-12-30 | 2012-07-11 | 中国船舶重工集团公司第七二五研究所 | Method for measuring compact tension specimen fracture parameters by using double extensometers |
| CN104535410A (en) * | 2014-11-24 | 2015-04-22 | 中国航空工业集团公司北京航空材料研究院 | Temperature compensation method used for compact tension sample high temperature crack expansion test |
| CN105136531A (en) * | 2015-07-23 | 2015-12-09 | 成都航天龙宇质检技术有限公司 | Compact tensile sample used in material performance test |
Non-Patent Citations (1)
| Title |
|---|
| 李致良: "铝镁钪合金断裂韧度与疲劳裂纹扩展研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916686A (en) * | 2019-04-04 | 2019-06-21 | 上海交通大学 | A kind of test sample of the anisotropy breaking strength of sheet metal |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20170104 |