CN105334162A - Aluminum-lithium alloy surface crack and residual intensity relation analysis method - Google Patents
Aluminum-lithium alloy surface crack and residual intensity relation analysis method Download PDFInfo
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- CN105334162A CN105334162A CN201510846222.XA CN201510846222A CN105334162A CN 105334162 A CN105334162 A CN 105334162A CN 201510846222 A CN201510846222 A CN 201510846222A CN 105334162 A CN105334162 A CN 105334162A
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- lithium alloy
- aluminium lithium
- crack
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/08—Detecting presence of flaws or irregularities
Abstract
The invention discloses an aluminum-lithium alloy surface crack and residual intensity relation analysis method. The aluminum-lithium alloy surface crack analysis method comprises the following steps: step 1: grouping; step 2: carrying out notch processing on an aluminum-lithium alloy part to be detected in each group; step 3: carrying out a crack extending test on the aluminum-lithium alloy part to be detected until an initial crack tip is formed; step 4: stopping one aluminum-lithium alloy part group to be detected which is subjected to the crack extending test and continually carrying out the crack extending test; step 5: when the cyclic load is loaded for pre-set number of times in the crack extending test, stopping one aluminum-lithium alloy part group to be detected until all the aluminum-lithium alloy part groups to be detected are stopped; step 6: measuring the crack length and the number of times of circulating of the aluminum-lithium alloy part to be detected; step 7: carrying out a residual intensity test; step 8: establishing a relational table. With the adoption of the method, relations between the crack length and the residual intensity, and between the crack extending speed and the residual intensity can be established.
Description
Technical field
The present invention relates to aluminium lithium alloy technical field, be specifically related to a kind of aluminium lithium alloy surface crack and residual intensity relationship analysis method.
Background technology
Aluminium lithium alloy has the advantage of low-density, high specific strength and high specific stiffness, is widely used in aerospace field.The surface that the surface peenings such as passing hole coldworking strengthened and shot peening strengthening can improve component produces residual compressive stress, thus improves the serviceable life of component.
Common Crack Extension performance evaluation method just evaluates the speed of Crack Extension, can not carry out anticipation to the degree of injury of component.
Therefore, wish a kind of technical scheme to overcome or at least alleviate at least one the problems referred to above of prior art.
Summary of the invention
The object of the present invention is to provide a kind of aluminium lithium alloy surface crack and residual intensity relationship analysis method to overcome or at least alleviate at least one the problems referred to above of the prior art.
For achieving the above object, the invention provides a kind of aluminium lithium alloy surface crack and residual intensity relationship analysis method, described aluminium lithium alloy analysis of Surface Crack method comprises the steps: step 1: divided into groups by aluminium lithium alloy part to be measured, thus form many groups aluminium lithium alloy part group to be measured, often group has multiple aluminium lithium alloy part to be measured; Step 2: breach process is carried out to the aluminium lithium alloy part each to be measured in every group, thus makes each aluminium lithium alloy part to be measured all have identical breach; Step 3: carry out crack expansion test to the aluminium lithium alloy part each to be measured in every group, until it is most advanced and sophisticated to form initial crack; Step 4: stop one group of aluminium lithium alloy part group to be measured of carrying out crack expansion test, and proceed described crack expansion test; Step 5: described crack expansion test often loads pre-determined number cyclic loading, stops one group of aluminium lithium alloy part group to be measured of carrying out crack expansion test, till all groups of aluminium lithium alloy part groups to be measured all being stopped; Step 6: measure and often organize the crack length of aluminium lithium alloy part group to be measured and the cycle index of this group aluminium lithium alloy part to be measured group; Step 7: aluminium lithium alloy part group to be measured for each group in described step 6 is carried out residual intensity test; Step 8: set up crack length and residual intensity relation table and crack growth rate and residual intensity relation table.
Preferably, the pre-determined number in described step 5 is 2000 times.
Preferably, the residual intensity test in described step 7 adopts GB/T228.1 method to test.
Preferably, the breach process in described step 2 adopts wire cutting method to make.
Preferably, described often group in aluminium lithium alloy part group to be measured comprises 3 to 5 aluminium lithium alloy parts to be measured.
Aluminium lithium alloy surface crack provided by the invention and residual intensity relationship analysis method, crack length and residual intensity and crack growth rate and residual intensity are set up respectively and contacts, thus the degree of injury of aluminium lithium alloy part to be measured is judged, for equipment maintenance maintenance provides foundation.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of aluminium lithium alloy surface crack according to a first embodiment of the present invention and residual intensity relationship analysis method.
Embodiment
For making object of the invention process, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is further described in more detail.In the accompanying drawings, same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Described embodiment is the present invention's part embodiment, instead of whole embodiments.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.Below in conjunction with accompanying drawing, embodiments of the invention are described in detail.
In describing the invention; it will be appreciated that; term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward " etc. instruction orientation or position relationship be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply indication device or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limiting the scope of the invention.
Fig. 1 is the schematic flow sheet of aluminium lithium alloy surface crack according to a first embodiment of the present invention and residual intensity relationship analysis method.
Aluminium lithium alloy analysis of Surface Crack method as shown in Figure 1 comprises the steps: step 1: divided into groups by aluminium lithium alloy part to be measured, thus forms many groups aluminium lithium alloy part group to be measured, and often group has multiple aluminium lithium alloy part to be measured; Step 2: breach process is carried out to the aluminium lithium alloy part each to be measured in every group, thus makes each aluminium lithium alloy part to be measured all have identical breach; Step 3: carry out crack expansion test to the aluminium lithium alloy part each to be measured in every group, until it is most advanced and sophisticated to form initial crack; Step 4: stop one group of aluminium lithium alloy part group to be measured of carrying out crack expansion test, and proceed described crack expansion test; Step 5: described crack expansion test often loads pre-determined number cyclic loading, stops one group of aluminium lithium alloy part group to be measured of carrying out crack expansion test, till all groups of aluminium lithium alloy part groups to be measured all being stopped; Step 6: measure and often organize the crack length of aluminium lithium alloy part group to be measured and the cycle index of this group aluminium lithium alloy part to be measured group; Step 7: aluminium lithium alloy part group to be measured for each group in described step 6 is carried out residual intensity test; Step 8: set up crack length and residual intensity relation table and crack growth rate and residual intensity relation table respectively.
Preferably, the pre-determined number in described step 5 is 2000 times.Be understandable that, this pre-determined number can sets itself as required.Such as, pre-determined number is 1000 times, for 1500 times or more.
Preferably, the residual intensity test in described step 7 adopts GB/T228.1 method to test.
Preferably, the breach process in described step 2 adopts wire cutting method to make.
Preferably, described often group in aluminium lithium alloy part group to be measured comprises 3 to 5 aluminium lithium alloy parts to be measured.
Be understandable that, namely concrete crack length and residual intensity relation table and crack growth rate and residual intensity relation table can be set up by above-mentioned data, do not repeat them here.
Finally it is to be noted: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit.Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (5)
1. aluminium lithium alloy surface crack and a residual intensity relationship analysis method, is characterized in that, described aluminium lithium alloy analysis of Surface Crack method comprises the steps:
Step 1: aluminium lithium alloy part to be measured is divided into groups, thus form many groups aluminium lithium alloy part group to be measured, often group has multiple aluminium lithium alloy part to be measured;
Step 2: breach process is carried out to the aluminium lithium alloy part each to be measured in every group, thus makes each aluminium lithium alloy part to be measured all have identical breach;
Step 3: carry out crack expansion test to the aluminium lithium alloy part each to be measured in every group, until it is most advanced and sophisticated to form initial crack;
Step 4: stop one group of aluminium lithium alloy part group to be measured of carrying out crack expansion test, and proceed described crack expansion test;
Step 5: described crack expansion test often loads pre-determined number cyclic loading, stops one group of aluminium lithium alloy part group to be measured of carrying out crack expansion test, till all groups of aluminium lithium alloy part groups to be measured all being stopped;
Step 6: measure and often organize the crack length of aluminium lithium alloy part group to be measured and the cycle index of this group aluminium lithium alloy part to be measured group;
Step 7: aluminium lithium alloy part group to be measured for each group in described step 6 is carried out residual intensity test;
Step 8: set up crack length and residual intensity relation table and crack growth rate and residual intensity relation table.
2. aluminium lithium alloy surface crack as claimed in claim 1 and residual intensity relationship analysis method, it is characterized in that, the pre-determined number in described step 5 is 2000 times.
3. aluminium lithium alloy surface crack as claimed in claim 1 and residual intensity relationship analysis method, is characterized in that, the residual intensity test in described step 7 adopts GB/T228.1 method to test.
4. aluminium lithium alloy surface crack as claimed in claim 1 and residual intensity relationship analysis method, is characterized in that, the breach process in described step 2 adopts wire cutting method to make.
5. aluminium lithium alloy surface crack as claimed in claim 1 and residual intensity relationship analysis method, it is characterized in that, described often group in aluminium lithium alloy part group to be measured comprises 3 to 5 aluminium lithium alloy parts to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510846222.XA CN105334162A (en) | 2015-11-26 | 2015-11-26 | Aluminum-lithium alloy surface crack and residual intensity relation analysis method |
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| CN201510846222.XA CN105334162A (en) | 2015-11-26 | 2015-11-26 | Aluminum-lithium alloy surface crack and residual intensity relation analysis method |
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| CN105334162A true CN105334162A (en) | 2016-02-17 |
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Citations (5)
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| CN101231222A (en) * | 2008-02-15 | 2008-07-30 | 上海理工大学 | Method for rapidly and nondestructively prediction of residual strength and residual lifetime |
| JP5038113B2 (en) * | 2007-12-05 | 2012-10-03 | 川崎重工業株式会社 | Destructive evaluation method for structures |
| CN103063508A (en) * | 2012-12-26 | 2013-04-24 | 华东理工大学 | Nondestructive testing method for metal material fracture toughness |
| CN103344480A (en) * | 2013-06-17 | 2013-10-09 | 中国航空工业集团公司北京航空材料研究院 | Device for testing crack growth and residual strength of thin-wall plate with stringers |
| CN104035455A (en) * | 2014-05-20 | 2014-09-10 | 北京航空航天大学 | Stress control method for measuring residual strength and residual life of composite material |
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2015
- 2015-11-26 CN CN201510846222.XA patent/CN105334162A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5038113B2 (en) * | 2007-12-05 | 2012-10-03 | 川崎重工業株式会社 | Destructive evaluation method for structures |
| CN101231222A (en) * | 2008-02-15 | 2008-07-30 | 上海理工大学 | Method for rapidly and nondestructively prediction of residual strength and residual lifetime |
| CN103063508A (en) * | 2012-12-26 | 2013-04-24 | 华东理工大学 | Nondestructive testing method for metal material fracture toughness |
| CN103344480A (en) * | 2013-06-17 | 2013-10-09 | 中国航空工业集团公司北京航空材料研究院 | Device for testing crack growth and residual strength of thin-wall plate with stringers |
| CN104035455A (en) * | 2014-05-20 | 2014-09-10 | 北京航空航天大学 | Stress control method for measuring residual strength and residual life of composite material |
Non-Patent Citations (3)
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| 《机械制造与自动化》 * |
| 支利勇 等: "含裂纹金属梯度材料的剩余强度研究", 《机械制造与自动化》 * |
| 韩增祥: "金属热疲劳试验方法的探索", 《理化检测（物理分册）》 * |
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| CB03 | Change of inventor or designer information |
Inventor after: Yang Xu Inventor after: Jing Lulu Inventor after: Xu Guangxing Inventor after: Li Haitao Inventor after: Liu Hongtao Inventor before: Yang Xu Inventor before: Jing Lvlu Inventor before: Xu Guangxing Inventor before: Li Haitao Inventor before: Liu Hongtao |
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Application publication date: 20160217 |