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亚温淬火45钢的断裂韧度试验

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Indexed by:期刊论文

Date of Publication:2016-11-08

Journal:理化检验-物理分册

Volume:52

Issue:11

Page Number:759-762

ISSN No.:1001-4012

Key Words:亚温淬火;45 钢;断裂韧度;试样厚度

Abstract:针对平面应变断裂韧度测试中试样厚度条件的选择问题,以760℃亚温淬火45钢紧凑拉伸试样断裂韧度试验为例,分析讨论了试样厚度对断裂韧度的影响以及试验获得平面应变断裂韧度有效值的约束条件。结果表明:传统断裂韧度试验的厚度要求不一定适合作为亚温淬火45钢试样尺寸的要求依据;对于亚温淬火45钢脆性材料的试样,若断裂破坏以正断为主,其厚度已经满足平面应变条件的要求,从而可以测出断裂韧度。

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