万响亮,李光强,周博文,马江华,徐光

• 1:武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室

摘要(Abstract)：

对Fe-17Cr-7Ni采用77%冷轧和700℃退火100 s工艺获得纳米晶(<100 nm)/超细晶(100~500 nm)和部分粗晶(>1μm)组成的微米/纳米复合结构奥氏体组织,其平均晶粒尺寸为500 nm。通过拉伸实验研究了微米/纳米复合结构奥氏体不锈钢力学性能、形变机制和应变硬化行为。结果表明这种微米/纳米复合结构奥氏体不锈钢屈服和抗拉强度分别为939 MPa和1098 MPa,伸长率高达38.8%。分析应变硬化率曲线表明拉伸过程中形变分为四个区间。结合透射电镜组织观察结果,发现形变过程中粗晶奥氏体先转化为形变马氏体,随后纳米晶/超细晶奥氏体转变为形变孪晶,表明这种高强度高塑性微米/纳米复合结构奥氏体不锈钢形变机制为TWIP和TRIP复合形变机制。

关键词(KeyWords)： 奥氏体不锈钢;形变机制;应变硬化;奥氏体稳定性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51501134)

作者(Author): 万响亮,李光强,周博文,马江华,徐光

DOI: 10.13289/j.issn.1009-6264.2015.11.013

参考文献(References)：

• [1]Lo K H,Shek C H,Lai J K L.Recent developments in stainless steels[J].Materials Science and Engineering R,2009,65:39-104.
• [2]Karjalainen L P,Taulavuori T,Sellman M,et al.Some strengthening methods for austenitic stainless steels[J].Steel Research International,2008,79:404-412.
• [3]Misra R D K,Nayak S,Mali S A,et al.On the significance of nature of strain-induced martensite on phase-reversion-induced nanograined/ultrafinegrained austenitic stainless steel[J].Metallurgical and Materials Transactions A,2010,41:3-12.
• [4]Sabooni S,Karimzadeh F,Enayati M H.Thermal stability study of ultrafine grained 304L stainless steel produced by martensitic process[J].Journal of Materials Engineering and Performance,2014,23:1665-1672.
• [5]Kisko A,Misra R D K,Talonen J,et al.The influence of grain size on the strain-induced martensite formation in tensile straining of anaustenitic 15Cr-9Mn-Ni-Cu stainless steel[J].Materials Science and Engineering A,2013,578:408-416.
• [6]Behjati P,Kermanpur A,Najafizadeh A,et al.Effect of annealing temperature on nano/ultrafine grain of Ni-free austenitic stainless steel[J].Materials Science and Engineering:A,2014,592:77-82.
• [7]Johannsen D L,Kyrolainen A,Ferreira PJ.Ferreira,Influence of annealing treatment on the formation of nano/submicron grain size AISI 301 austenitic stainless steels 2006[J].Metallurgical and Materials Transactions A,2006,37:2325-2338.
• [8]Cooman B C D,Kwon O,Chin K G.State-of-the-knowledge on TWIP steel[J].Materials Science and Technology,2012,5:513-527.
• [9]Allain S,Chateau J P,Bouaziz O,et al.Correlations between the calculated stacking fault energy and the plasticity mechanisms in Fe-Mn-C alloys[J].Materials Science and Engineering A,2004,387-389:158-162.
• [10]Challa V S A,Wan X L,Somani M C,et al.Strain hardening behavior of phase reversion-induced nanograined/ultrafine-grained(NG/UFG)austenitic stainless steel and relationship with grain size and deformation mechanism[J].Materials Science and Engineering A,2014,613:60-71.
• [11]Jun J H,Choi C S.Variation of stacking fault energy with austenite grain size and its effect on the MStemperature ofγ→εmartensitic transformation in Fe-Mn alloy[J].Materials Science and Engineering A,1998,257:353-356.
• [12]Misra R D K,Zhang Z,Jia Z,et al.Probing deformation processes in near-defect free volume in high strength-high ductility nanograined/ultrafinegrained(NG/UFG)metastable austenitic stainless steels[J].Scripta Materialia,2010,63:1057-1060.
• [13]Jin J E,Lee Y K.Strain hardening behavior of a Fe-18Mn-0.6C-1.5Al TWIP steel[J].Materials Science and Engineering A,2009,527:157-161.
• [14]Ding H,Ding H,Song D,et al.Strain hardening behavior of a TRIP/TWIP steel with 18.8%Mn[J].Materials Science and Engineering A,2011,528:868-873.
• [15]Gutierrez-Urrutia I,Raabe D.Grain size effect on strain hardening in twinning-induced plasticity steels[J].Scripta Materialia,2012,66:992-996.
• [16]Dini G,Najafizadeh A,Ueji R,et al.Tensile deformation behavior of high manganese austenitic steel:The role of grain size[J].Mater Design,2010,31:3395-3402.
• [17]武会宾,武凤娟,杨善武,等.微米/亚微米双峰尺度奥氏体组织形成机制[J].金属学报,2014,50(3):269-274.WU Hui-bin,WU Feng-juan,YANG Shan-wu,et al.The formation mechanism of austenite structure with micro/sub-micrometer binodal grain size distribution[J].Acta Metallurgica Sinica,2014,50(3):269-274.
• [18]Takaki S,Fukunaga K,Syarif J,et al.Effect of grain refinement on thermal stability of metastable austenitic steel[J].Materials Transactions,2004,45:2245-2251.
• [19]Yoo C S,Park Y M,Jung Y S,et al.Effect of grain size on transformation-induced plasticity in an ultrafine-grained metastable austenitic steel[J].Scripta Materialia,2008,58:71-74.

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