Effect of Pre-deformation on Nanoscale Precipitation and Hardness of a Maraging Stainless Steel

作     者：Xinlei Zhou Bin Wang Tianyi Zeng Wei Yan Junhua Luan Wei Wang Ke Yang Zengbao Jiao Xinlei Zhou;Bin Wang;Tianyi Zeng;Wei Yan;Junhua Luan;Wei Wang;Ke Yang;Zengbao Jiao

作者机构：School of Materials Science and EngineeringUniversity of Science and Technology of ChinaShenyang 110016China Shi-Changxu Innovation Center for Advanced MaterialsInstitute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Material Science and EngineeringZhengzhou UniversityZhengzhou 450001China Department of Materials Science and EngineeringCity University of Hong KongHong KongChina Department of Mechanical EngineeringThe Hong Kong Polytechnic UniversityHong KongChina 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2022年第35卷第12期

页      面：2089-2100页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：sponsored by the Youth Innovation Promotion Association of Chinese Academy of Sciences(No.2017233) 

主　　题：Maraging stainless steel Pre-deformation Precipitation hardening Atom probe tomography 

摘      要：The effect of pre-deformation on nanoscale precipitates and hardness of a maraging stainless steel strengthened by the coprecipitation of Ni_(3)Ti,Mo-enriched and Cr-enriched precipitates was systematically studied using electron back scattered diffraction,transmission electron microscopy and atom probe tomography(APT).Hardness measurements showed that the hardness of specimen with a deformation ratio of 90%peaked at HV 718 aged for 24 h,which is higher than that in the undeformed specimen(HV 603)aged for 72 h at 480℃.APT characterization revealed that pre-deformation could shorten the incubation time of the Mo-enriched and Cr-enriched *** the early-aged stage,pre-deformation increased the stain energy that inhibited the nucleation of Ni_(3)Ti precipitates,but accelerated the rejection of Mo from Ni-Ti ***,the strengthening model indicated that strain hardening(43%)makes a larger contribution to the hardness at the early-aged condition,while precipitation hardening(58%)has most contribution to the hardness at the peak-aged conditition.