采用圆环三角试样评价材料的尺寸稳定性  

Evaluation of Dimensional Stability of Materials by Ring Triangular Specimen

作　　者：顾开选[1] 王凯凯 郭嘉[1] 翁泽钜 王俊杰[1,3] GU Kaixuan;WANG Kaikai;GUO Jia;WENG Zeju;WANG Junjie(Key Laboratory of Space Energy Conversion Technology,Chinese Academy of Sciences,Beijing 100190,China;Shougang Research Institute of Technology,Beijing 100043,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院空间功热转换技术重点实验室,北京100190 [2]首钢集团有限公司技术研究院,北京100043 [3]中国科学院大学,北京100049

出　　处：《理化检验（物理分册）》2021年第6期21-26,共6页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：国家自然科学基金(51805521);中国科学院理化技术研究所所长基金。

摘　　要：提出了一种圆环三角法进行尺寸稳定性评价,通过圆环三角试样沿底边开口后引起的顶角及两侧面平行度的变化对7050铝合金的尺寸稳定性进行了评价。并将深冷处理与7050铝合金的固溶时效进行结合,探索了不同工艺对7050铝合金圆环三角尺寸稳定性的影响。结果表明:淬火态圆环三角试样开口顶角角度和平行度变化最大,而固溶处理后时效处理前增加深冷处理圆环三角试样顶角角度和平行度变化最小。尺寸稳定性的变化结果与残余应力检测结果吻合,说明该方法能够从残余应力层面对尺寸稳定性进行有效评价。A ring triangle method was proposed to evaluate the dimensional stability. The dimensional stability of 7050 aluminum alloy was evaluated by the change of vertex angle and parallelism of two sides after opening of the ring triangle specimen along the bottom line. The cryogenic treatment and solution aging of 7050 aluminum alloy were combined to explore the influence of different processes on the dimensional stability of 7050 aluminum alloy ring triangle. The results show that the change of vertex angle and parallelism in quenched ring triangular specimen was the largest, while the change of vertex angle and parallelism which in specimen treated by conduction of cryogenic treatment after solution and prior to aging was the smallest. The results of dimensional stability was in good agreement with the result of residual stress, which show that the ring triangle specimen method can effectively evaluate the dimension stability from the residual stress layer.

关 键 词：尺寸稳定性 圆环三角试样 7050铝合金 残余应力 深冷处理 

分 类 号：V250.2[一般工业技术—材料科学与工程]