牟洋,薛丽红,蒲少玲,严有为

• 1:华中科技大学模具技术国家重点实验室

摘要(Abstract)：

采用Gleeble-3500热力模拟试验机研究了不同变形量下超洁净低活化马氏体钢(SCRAM钢)的组织结构和拉伸性能的变化。利用光学显微镜、透射电镜及扫描电镜对其微观组织进行了观察,用Instron-5848微型材料试验机对其拉伸性能进行了测试。结果表明:温变形可以有效的细化马氏体板条束和增加位错密度。随着变形量的增加,位错组态逐渐由位错线、位错堆积等低密度位错组态转变为重的位错缠结、位错胞等高密度位错组态。当变形量达到ε=0.5时,试样具有高的抗拉强度和屈服强度,但是伸长率和断面收缩率较低。拉伸断口表明随着变形量的增加,韧窝逐渐变得浅而细小。

关键词(KeyWords)： 热力模拟试验机;SCRAM钢;温变形;位错密度;韧窝

Abstract:

Keywords:

基金项目(Foundation): 国际热核聚变实验堆(ITER)计划专项(2010GB109000);; 聚变堆关键材料的辐照损伤机理的基础研究(2011GB108000)

作者(Author): 牟洋,薛丽红,蒲少玲,严有为

DOI: 10.13289/j.issn.1009-6264.2014.07.023

参考文献(References)：

• [1]Schaaf B van der,Gelles D S,Jitsukawa S,et al.Progress and critical issues of reduced activation ferritic/martensitic steel development[J].Journal of Nuclear Materials,2000,283-287:52-59.
• [2]Tanigawa H,Shiba K,Sakasegawa H,et al.Technical issues related to the development of reduced-activation ferritic/martensitic steels as structural materials for a fusion blanket system[J].Fusion Engineering and Design,2011,86:2549-2552.
• [3]Kimura A,Kasada R,Kohyama A,et al.Recent progress in US-Japan collaborative research on ferritic steels R&D[J].Journal of Nuclear Materials,2007,367:60-67.
• [4]Baluc N,Gelles D S,Jitsukawa S,et al.Status of reduced activation ferritic/martensitic steel development[J].Journal of Nuclear Materials,2007,367-370:33-41.
• [5]Klueh R L.Reduced-activation steels:Future development for improved creep strength[J].Journal of Nuclear Materials,2008,378:159-166.
• [6]Xiong X S,Yang F,Zou X R,et al.Effect of twice quenching and tempering on the mechanical properties and microstructures of SCRAM steel for fusion application[J].Journal of Nuclear Materials,2012,430:114-118.
• [7]Ullmaier H,Trinkaus H.Helium in metals:effect on mechanical properties[J].Materials Science Forum,1992,97-99:451.
• [8]Klueh R L,Gelles D S,Jitsukawa S,et al.Ferritic/martensitic steels-overview of recent results[J].Journal of Nuclear Materials,2002,307-311:455-465.
• [9]Trinkaus H,Singh B N.Helium accumulation in metals during irradiation-where do we stand?[J].Journal of Nuclear Materials,2003,323:229-242.
• [10]Kimura A,Kasada R,Morishita K,et al.High resistance to helium embrittlement in reduced activation martensitic steels[J].Journal of Nuclear Materials,2002,307-311:521-526.
• [11]张占领,柳永宁,张柯柯,等.形变对超高碳钢组织细化的影响[J].材料热处理学报,2009,30(3):89-91.ZHANG Zhan-ling,LIU Yong-ning,ZHANG Ke-ke,et al.Effect of deformation on microstructure refinement of an ultrahigh carbon steel[J].Transactions of Metal Heat Treatment,2009,30(3):89-91.
• [12]Poorganji B,Miyamoto G,Maki T,et al.Formation of ultrafine grained ferrite by warm deformation of lath martensite in low-alloy steels with different carbon content[J].Scripta Materialia,2008,59:279-281.
• [13]Li Q,Wang T S,Jing T F,et al.Warm deformation behavior of quenched medium carbon steel and its effect on microstructure and mechanical properties[J].Materials Science and Engineering A,2009,515:38-42.
• [14]Xu Z,Sakai T.Kinetics of recovery and recrystallization in dynamically recrystallized austenite[J].Materials Transactions,1991,32(22):174-180.
• [15]董海峰,蔡大勇,王玉辉,等.Cr微合金化低碳钢热变形行为[J].材料热处理学报,2009,30(6):47-50.DONG Hai-feng,CAI Da-yong,WANG Yu-hui,et al.Hot deformation behavior of Cr micro-alloyed low carbon steel[J].Transactions of Metal Heat Treatment,2009,30(6):47-50.
• [16]Han B S,Xu Z.Grain refinement under multi-axial forging in Fe-32%Ni alloy[J].Journal of Alloys and Compounds,2008,457(1-2):279-285.

文章评论(Comment)：