典型文献
Enhanced fatigue property by fabricating a gradient nanostructured surface layer in a reduced-activation steel
文献摘要：
Reduced activation ferritic/martensitic(RAFM)steels have been selected as candidate structural materials for future advanced nuclear power systems.In the present work,the influence of a gradient nanograined surface layer on the fatigue properties of RAFM steels was studied.A gradient nanostructured(GNS)surface layer with a thickness of-85 μm was prepared on RAFM steel utilizing surface mechanical rolling treatment(SMRT).The mean grain size was approximate 43 nm at the topmost surface and increased gradually with depth.The results of the stress-controlled tension-compression fatigue experiments showed that the fatigue life enhanced approxi-mately 6 times in the SMRT samples compared to the corresponding base metal counterparts.The relationship between the applied stress amplitude and the fatigue lifetime,and the fracture morphology showed that the surface strengthening and strain delocalization were caused by GNS,which suppressed surface crack initiation process,and hence the fatigue properties of RAFM steels improved.In addition,the deformation compatibility in GNS and coarse-grained boundaries leading to more dislocation interactions and accumulation during the cyclic process,also plays a crucial role in enhancing the fatigue properties of RAFM steel.
文献关键词：
中图分类号：
作者姓名：
Yanyun Zhao;Mengtian Liang;Shaojun Liu;Weihua Zhang
作者机构：
College of Nuclear Equipment and Nuclear Engineering,Yantai University,Yantai,Shandong,264010,China;International Academy of Neutron Science,Qingdao,Shandong,266199,China;Institute of Nuclear Energy Safety Technology,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei,Anhui,230031,China;Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,72 Wenhua Road,Shenyang,110016,China;School of Materials Science and Engineering,China University of Petroleum(East China),Qingdao,266580,China
文献出处：
引用格式：
[1]Yanyun Zhao;Mengtian Liang;Shaojun Liu;Weihua Zhang-.Enhanced fatigue property by fabricating a gradient nanostructured surface layer in a reduced-activation steel)[J].自然科学进展·国际材料（英文）,2022(03):385-391
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AB值：
0.599802
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