研究了7075T73510合金的断裂韧性和疲劳裂纹扩展行为,分析了不同方向性能差异的原因结果表明:合金的断裂韧性依赖于取向,L—T方向的断裂韧性值远大于T—L方向,而其疲劳裂纹扩展速率对应力比更敏感,无论T—L还是L—T方向,R=0.6时的FCGR值是R=0.1时的二倍左右.在相同应力比和较小的△K下,两个方向的FCGR值基本无差异文中认为:呈带状分布或串状分布的杂质相对T—L向断裂韧性影响较大
Fracture toughness and fatigue crack growth rate (FCGR) of 7075T73510 alloy have been studied. The difference in properties between (T-L) and (L-T) direction were analyzed.The results of plane stress fracture toughness indicate that fracture toughness is
参考文献
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[2] | JackTelesman.NASATechnicalMemorandum,83636,1984,April:32HanGT,RosenfildAR.MetallTransA1975:6533AerospaceMaterialSpecificationAMS,4167E,1979:34ThompsonDS,ZinkhamRE.EngFracMech,1975 |
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