宋辉,王晓姣,严菊杰,邱涛,李慧,刘文庆

• 1:上海大学微结构重点实验室

摘要(Abstract)：

将沉淀强化型奥氏体钢在980℃固溶1 h后淬火,然后在500~850℃时效4 h,750℃析出强化效果最好。结合透射电子显微镜(TEM)和场离子显微镜(FIM),用原子探针层析技术(APT)研究强化相析出过程。结果表明,析出相为球形,是与基体共格的面心立方结构的γ'-Ni3(Al,Ti)相。随着时效温度提高,析出相尺寸增大,密度降低,Al元素和Ti元素在析出相与基体中的分配比逐渐提高,Ti元素的分配比明显高于Al元素,表现出更强的析出倾向。

关键词(KeyWords)： 沉淀强化型奥氏体钢;γ'-Ni3(Al,Ti)相;分配比;原子探针层析技术

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重点项目(50931003);; 上海市重点学科建设项目(S30107)

作者(Author): 宋辉,王晓姣,严菊杰,邱涛,李慧,刘文庆

DOI: 10.13289/j.issn.1009-6264.2014.09.013

参考文献(References)：

• [1]Cicco H D,Luppo M I,Gribaudo L M,et al.Microstructural development and creep behaviour in A286 superalloy[J].Mater Charact,2004,52(2):85-92.
• [2]李秀艳,张建,戎利建,等.Fe-Ni基合金中次生η相的析出机理[J].材料研究学报,2006,20(2):113-118.LI Xiu-yan,ZHANG Jian,RONG Li-jian,et al.The precipitation mechanism of secondaryηphase in a FeNi-based alloy[J].Chiness Journal of Materials Research,2006,20(2):113-118.
• [3]陆世英.不锈钢[M].北京:原子能出版社,1995.
• [4]李依依,范存淦,戎利建,等.抗氢脆奥氏体钢及抗氢铝[J].金属学报,2010,46(11):1335-1346.LI Yi-yi,FAN Cun-gan,RONG Li-jian,et al.Hydrogen embrittlement resistance of austenitic alloys and aluminium alloys[J].Acta Metall Sin,2010,46(11):1335-1346.
• [5]赵久明,戎利建.B对Fe-Ni基合金显微组织和抗氢性能的影响[J].金属学报,2009,45(2):167-172.ZHAO Jiu-ming,RONG Li-jian.Effects of B on the microstructure and hydrogen resistance performance of Fe-Ni base alloy[J].Acta Metall Sin,2009,45(2):167-172.
• [6]Najafi H,Asgari S.Strain hardening mechanisms in aged AEREX350 superalloy[J].Materials Science and Engineering A,2005,398:204-208.
• [7]Toyama T,Nozawa Y,Renterghem W Van,et al.Irradiation-induced precipitates in a neutron irradiated 304 stainless steel studied by threedimensional atom probe[J].Journal of Nuclear Materials,2011,418:62-68.
• [8]Schober M,Schnitzer R,Leitner H.Precipitation evolution in a Ti-free and Ti-containing stainless maraging steel[J].Ultramicroscopy,2009,109:553-562.
• [9]Leitner H,Schober M,schnitzer R.Splitting phenomenon in the precipitation evolution in an Fe-Ni-Al-Ti-Cr stainless steel[J].Acta Materialia,2010,58(4):1261-1269.
• [10]Miller M K.Atom Probe Tomography:Analysis at the Atomic Level[M].New York:Kluwer Academic/Plenum Publishers,2000.
• [11]Philippe T,Geuser F D,Duguay S.Duguay.Clustering and nearest neighbor distances in atom-probe tomography[J].Ultramicroscopy,2009,109:1304-1309.
• [12]Zheng Z Q,Liu W Q,Sha G,et al.Solute clustering and solute nanostructures in an Al-3.5Cu-0.4Mg-0.2Ge alloy[J].Acta Mater,2013,61:3724-3734.
• [13]Asgari S.Structure and strain hardening of superalloy AEREX350[J].Journal of Materials Processing Technology,2001,118:246-250.
• [14]Miller M K,Smith G D W,巩运明,等.原子探针显微分析:原理和应用[M].北京:北京大学出版社,1993.
• [15]刘文庆,周邦新.场离子显微镜和原子探针,中国材料工程大典第26卷[M].徐祖耀,黄本之,鄢国强,等编.北京:化学工业出版社,2006.

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