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Metallic materials — Tensile testing — Part 4: Method of test in liquid helium
| 분야 | ISO/TC 164/SC 1 : Uniaxial testing |
|---|---|
| 적용범위 | ISO 6892-4:2015 specifies the method of tensile testing of metallic materials in liquid helium (the boiling point is ?269 °C or 4,2 K, designated as 4 K) and defines the mechanical properties that can be determined. This part of ISO 6892 may apply also to tensile testing at cryogenic temperatures (less than ?196 °C or 77 K), which requires special apparatus, smaller test pieces, and concern for serrated yielding, adiabatic heating, and strain-rate effects. To conduct a tensile test according to this part of ISO 6892 at 4 K, the test piece installed in a cryostat is fully submerged in liquid helium (He) and tested using displacement control at a nominal strain rate of 10−3 s−1 or less. NOTE The boiling point of the rare 3He isotope is 3,2 K. Usually, the tests are performed in 4He or a mixture of 3He and 4He with a high concentration of 4He. Therefore, the temperature is, as designated before, 4 K. |
| 국제분류(ICS)코드 | 77.040.10 : 금속의 기계적 시험 |
| 페이지수 | 13 |
| Edition | 1 |
| No. | 표준번호 | 표준명 | 발행일 | 상태 |
|---|---|---|---|---|
| 1 | ISO 6892-4:2015 | Metallic materials — Tensile testing — Part 4: Method of test in liquid helium | 2015-09-29 | 표준 |
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