外应力对GH4169合金时效强化作用的影响  

Effects of external stress on age hardening of GH4169 alloy

作　　者：迟海[1,2] 郭霞 秦海龙[3] 王凯 毕中南[3] 贺俊智[1,2] 刘伟丽[1,2,4] 高峡 Chi Hai;Guo Xia;Qin Hailong;Wang Kai;Bi Zhongnan;He Junzhi;Liu Weili;Gao Xia(Beijing Center for Physical and Chemical Analysis, Beijing 100089, China;Beijing Key Laboratory of Organic Materials Tes- ting Technology ＆ Quality Evaluation, Beijing 100089, China;Beijing Academy of Science and Technology, Key Laboratory of Analysis and Testing Technology, Beijing 10089, China;High Temperature Materials Research Division, Central Iron ＆ Steel Research Institute, Beijing, 100081, China)

机构地区：[1]北京市理化分析测试中心,北京100094 [2]有机材料检测技术与质量评价北京市重点实验室,北京100094 [3]钢铁研究总院高温材料研究所,北京100081 [4]北京市科学技术研究院分析测试技术重点实验室,北京100089

出　　处：《分析仪器》2018年第2期171-173,共3页Analytical Instrumentation

基　　金：北京市财政资金改革与发展课题(2018ZL0101)

摘　　要：采用应力保载与时效相结合的方法对GH4169合金进行应力时效热处理,通过检测时效后合金的屈服强度和抗拉强度来衡量外应力施加对合金时效强化效果的影响。结果表明,时效初期外应力会强烈促进γ″相形核析出,合金强化效果显著;随时效时间的增加,时效中后期合金强化效果逐渐减弱;长时时效8h后外应力促进形核作用导致γ″相尺寸减小,使得合金强度反而低于无外应力条件。External stress-aging heat treatments were conducted on GH4169 alloy with stress holding combined with aging with the universal testing machine.Yield strength and tensile strength of the alloy after aging were tested to judge the influence of external stress on the hardening effects of the alloy.The results showed that the nucleation and precipitation of theγ″phase was strongly promoted by external stress in the early stage of aging producing remarkable strengthening effects.With the increase of aging time,the strengthening effect of alloy was gradually weakened in the intermediate and late stages of aging.After 8 h of aging,nucleation was promoted and the size ofγ″phase was reduced with the external stress,making the strength of the alloy lower than that under the non-external stress condition.

关 键 词：GH4169 外应力 时效 强度 

分 类 号：TG132.3[一般工业技术—材料科学与工程]