| 潘小强,徐虬,杉浦悠作,横谷拓哉,义家敏正.He对仅含位错的纯Fe力学性能的影响研究[J].材料导报,2016,30(10):1-4 |
| He对仅含位错的纯Fe力学性能的影响研究 |
| Effects of Helium on Mechanical Properties of Fe Containing Only Dislocation Defects |
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| DOI：10.11896/j.issn.1005-023X.2016.10.001 |
| 中文关键词: 纯铁 He离子注入 位错 力学性能 |
| 英文关键词: iron, He implantation, dislocation, mechanical property |
| 基金项目: |
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| 中文摘要: |
| 在反应堆运行过程中,核材料中的He通过核反应产生,并对材料性能的影响较大。通常认为,He会造成材料强度的上升,韧塑性的下降。制备了不同变形量的仅含位错的纯铁样品,开展了He原子对于样品力学性能影响研究,并对影响机理进行了初步分析。结果表明,不同的变形量下,He的注入使得样品的拉伸强度或有所提升,或变化不大,但所有样品的延伸率均得到了不同程度的提高。该结果与通常认为的“氦脆”现象不相一致,由此可见,He并不总是降低金属材料的力学性能。 |
| 英文摘要: |
| He is one of the most important impurities generated by the nuclear transmutation induced by neutron irradiation, which has a great influence on the properties of nuclear materials. In the present study, the Fe samples containing only dislocation defects were prepared and the effects of He atoms on the samples′ mechanical properties were investigated. The experiment suggested that under the different deformation degree, the tensile stress increased or changed little after He implantation, while elongation of all the samples increased at the same time. These results disagreed with the popularly acknowledged “He embrittlement” mechanism, indicating that He atoms do not always degrade the mechanical properties of metals and alloys. |
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