论文部分内容阅读
查明了AHA最终形变热处理(FTMT)对7×××合金薄板显微组织和机械性能的影响,并与合金成分的影响进行了比较.采用时效温度70℃(158°F)～151℃(304°F)、冷轧变形量2.3～17.7%生产的薄板,表现出各种各样的单调屈服强度.在保持Zn/Mg比值恒定情况下改变Zn和Mg的水平,屈服强度发生类似的变化.为了比较FTMT与合金成分在获得最佳综合性能(强度、韧性和疲劳裂纹扩展)方面的作用,测定了上述一些材料的韧性和疲劳裂纹扩展(FCG)性能,并进行了对比.为了查明断裂特征与机械性能之间是否存在相关性,鉴定了组织,用显微镜检
The effects of the AHA final heat treatment (FTMT) on the microstructure and mechanical properties of 7 ××× alloy sheets were investigated and compared with the effects of the alloying elements.Using the aging temperature of 70 ℃ (158 ° F) ~ 151 ℃ 304 ° F) and cold deformation of 2.3-17.7%, showing a wide range of monotonous yield strengths.When Zn and Mg ratios were varied while keeping the Zn / Mg ratio constant, similar changes in yield strength In order to compare the role of FTMT with alloy compositions in achieving the best overall performance (strength, toughness and fatigue crack growth), the toughness and fatigue crack growth (FCG) properties of some of the above materials were measured and compared in order to identify Whether there is a correlation between fracture characteristics and mechanical properties, tissue was identified, microscopically examined