何思雨,周延军,林乙丑,杨婧钊,吕官丽,杜宜博,宋克兴

• 1:河南科技大学材料科学与工程学院
• 2:有色金属新材料与先进加工技术省部共建协同创新中心
• 3:中信重工机械股份有限公司
• 4:西北工业大学机电学院

摘要(Abstract)：

采用多场耦合残余应力调控试验机对C70350合金带材进行了超声振动试验，研究了超声振幅(0、25、30、35和40μm)对合金导电率、抗拉强度、伸长率以及残余应力的影响规律，分析了超声振动前后C70350合金带材的断口形貌、位错密度和微观组织等微结构特征。结果表明：通过施加不同的超声振幅，可在保持合金高的强度和导电性能的前提下，显著改善其残余应力的大小和分布。当超声振幅为35μm时，C70350合金带材的导电率为46.7%IACS,抗拉强度为841.3 MPa,伸长率为4.22%,平行于轧制方向和垂直于轧制方向的残余应力释放量分别为16 MPa和46 MPa。超声振动时效后合金内部的位错密度降低，导致晶格畸变减少，显著改善残余应力特征。

关键词(KeyWords)： C70350合金;超声振动;残余应力;抗拉强度;位错密度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52173297);; 国家重点研发计划(2021YFB3700704);; 河南省自然科学基金(202300410139);; 中原学者工作站资助项目(214400510028);; 河南省重点研发与推广专项(212102210441);; 中国工程科技发展战略河南研究院战略咨询研究项目(2021HENZDA02);; 河南省科学院科研开发专项(220910009);; 河南科技大学博士科研启动基金资助(4002/13480087)

作者(Author): 何思雨,周延军,林乙丑,杨婧钊,吕官丽,杜宜博,宋克兴

DOI: 10.13289/j.issn.1009-6264.2022-0154

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