IL22178A - Improving the mechanical characteristics of beryllium or beryllium alloy articles - Google Patents
Improving the mechanical characteristics of beryllium or beryllium alloy articlesInfo
- Publication number
- IL22178A IL22178A IL22178A IL2217864A IL22178A IL 22178 A IL22178 A IL 22178A IL 22178 A IL22178 A IL 22178A IL 2217864 A IL2217864 A IL 2217864A IL 22178 A IL22178 A IL 22178A
- Authority
- IL
- Israel
- Prior art keywords
- beryllium
- deformation
- improving
- mechanical characteristics
- imparted
- Prior art date
Links
- 229910052790 beryllium Inorganic materials 0.000 title claims description 5
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 title claims description 5
- 229910000952 Be alloy Inorganic materials 0.000 title claims description 3
- 238000000034 method Methods 0.000 claims description 9
- 238000001953 recrystallisation Methods 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000930 thermomechanical effect Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C25/00—Alloys based on beryllium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
Description
The present invention relates to a process for improving the mechanical characteristics of objects consisting of beryllium or beryllium alloy.
It is known that beryllium is a metal which is generally employed for the production of alloys* It is also used to produce Qaoingfctfor fuel elements of nuclear reactors.
Under the operating conditions of such a use, it is important to improve the mechanical characteristics of this metal and notably its elastic limit at elevated temperature and its ductility.
The present invention concerns a thermo-mechanical treatment which produces such an improvement.
The process according to the present invention is characterised in that thsre is imparted to the object , which is brought to a temperature close to its recrystall- MV isation temperature, a i©t permanent, deformation, generally below that of the critical cfilJ wurking at this temperature for a period such that there is obtained a considerable relief of the initial internal stress resulting from the imparted deformation, whereafter the object is allowed to cool.
The deformation may be imparted particularly by traction, compression, torsion or bending* The above defined thermo-mechanical treatment produces a change in the structure of the metal and in its mechanical characteristics.
By way of example, there will be mentioned an application of the process to beryllium sheet whose initial characteristics, determined by tensile tests, are the following: The sheet is brought to a .temperature of 600 0· and it is subjected to ooldTworking of 0·2% by traction. The deformation imparted is maintaiiied at this temperature for about 15 minutes, the said being necessary in order to ensure complete stress relief of the metal.
After this treatment, the characteristics of the metal, determined under the same conditions as the aforesaid initial characteristics, are the following: Temperature test B 0.2 kg/mm8 A% at °C. 35 4 100 23 14 200 14 34 500 12 26 600 8 50 It will be seen on comparing the two foregoing tables that the ductility of the metal treated is increased throughout the temperature range and is quintupled at 600° C. The value of the elastic limit at 600° 0. is doubled in relation to that of the original metal.
It is to be noted that the aforesaid complete stress relief phase is an essential condition of the treatment. If this condition is not satisfied, the characteristics of the metal are not modified* The treatment according to the invention is applicable to various structural states: rough extruded or rolled state, whether recrystallised or not, with or without preheating treatment.
The treatment according to the invention may be industrially applied to various products and in particular to tubes intended for the production of aaoiags Gov nuclear reactors. may be used for straightening This straightening may be effected by traction applied under the following conditions: a) the stress applied must involve an imparted deformation, for example by means of a screw system, and not an imparted force; b) the temperature and duration conditions depend only upon one factor: production of complete relief of the initial tension; c) the deformation to be imparted in this case will be a compromise between that necessary for straightening the tube and the optimum deformation determined in
Claims (1)
1. particularly and ascertained nature of our what the mm to be that what claim A process for improving the mechanical characteristics of objects consisting of beryllium or beryllitim characterised in that there is imparted to the said which are brought to a temperature close to the recrystallisation a ent generally below that of critical for this for a period such that there is obtained a considerable relief of the initial internal stress resulting from the imparted whereafter the said are allowed to A process according to claim characterised in that the said deformation is by A process according to claim characterised in that the said deformation is obtained by A process according to claim characterised in that the said deformation is obtained by A process according to claim characterised in that the said deformation is obtained by A process for improving the mechanical characteristics of objects consisting of beryllium or beryllium alloy substantially as hereinbefore Bated this 1st day of 1964 insufficientOCRQuality
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR950126A FR1381387A (en) | 1963-10-10 | 1963-10-10 | Process for improving the mechanical characteristics of objects made of beryllium or beryllium alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IL22178A true IL22178A (en) | 1968-01-25 |
Family
ID=8814070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL22178A IL22178A (en) | 1963-10-10 | 1964-10-02 | Improving the mechanical characteristics of beryllium or beryllium alloy articles |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3350241A (en) |
| BE (1) | BE653981A (en) |
| CH (1) | CH425244A (en) |
| DE (1) | DE1215941B (en) |
| ES (1) | ES304826A1 (en) |
| FR (1) | FR1381387A (en) |
| GB (1) | GB1056255A (en) |
| IL (1) | IL22178A (en) |
| LU (1) | LU47077A1 (en) |
| NL (1) | NL6411373A (en) |
| SE (1) | SE301727B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4017333A (en) * | 1975-08-25 | 1977-04-12 | Lockheed Missiles & Space Company, Inc. | Fine grain beryllium bodies |
| GB2191843B (en) * | 1986-06-12 | 1989-12-20 | Hollingsworth Uk Ltd | Vibration damper |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2872363A (en) * | 1948-07-14 | 1959-02-03 | Robert E Macherey | Method of working beryllium |
| GB868064A (en) * | 1958-02-13 | 1961-05-17 | Atomic Energy Authority Uk | Extrusion and drawing of beryllium |
| GB919423A (en) * | 1960-10-04 | 1963-02-27 | Atomic Energy Authority Uk | Metallurgical process for working beryllium |
-
1963
- 1963-10-10 FR FR950126A patent/FR1381387A/en not_active Expired
-
1964
- 1964-09-30 NL NL6411373A patent/NL6411373A/xx unknown
- 1964-10-01 US US400902A patent/US3350241A/en not_active Expired - Lifetime
- 1964-10-01 CH CH1275864A patent/CH425244A/en unknown
- 1964-10-02 GB GB40286/64A patent/GB1056255A/en not_active Expired
- 1964-10-02 IL IL22178A patent/IL22178A/en unknown
- 1964-10-03 LU LU47077A patent/LU47077A1/xx unknown
- 1964-10-05 BE BE653981D patent/BE653981A/xx unknown
- 1964-10-09 DE DEC34063A patent/DE1215941B/en active Pending
- 1964-10-09 SE SE12144/64A patent/SE301727B/xx unknown
- 1964-10-10 ES ES0304826A patent/ES304826A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL6411373A (en) | 1965-04-12 |
| SE301727B (en) | 1968-06-17 |
| CH425244A (en) | 1966-11-30 |
| ES304826A1 (en) | 1966-11-01 |
| DE1215941B (en) | 1966-05-05 |
| LU47077A1 (en) | 1964-12-03 |
| GB1056255A (en) | 1967-01-25 |
| US3350241A (en) | 1967-10-31 |
| BE653981A (en) | 1965-02-01 |
| FR1381387A (en) | 1964-12-14 |
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