| Fe-32%Ni合金超细晶粒奥氏体的马氏体相变微观结构研究 |
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| 引用本文： | 韩宝军,徐洲.Fe-32%Ni合金超细晶粒奥氏体的马氏体相变微观结构研究[J].金属热处理,2010,35(6). |
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| 作者姓名： | 韩宝军 徐洲 |
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| 作者单位： | 1. 赣南师范学院化学与生命科学学院,江西赣州,341000
2. 上海交通大学材料科学与工程学院,上海,200240 |
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| 摘 要： | 通过多轴锻造的方法实现了Fe-32%Ni合金奥氏体晶粒超细化,并进行深冷处理使之发生马氏体相变.采用透射电镜(TEM)观察了超细晶粒Fe-32%Ni合金奥氏体相变后马氏体的微观结构.结果表明,超细晶粒奥氏体相变后的马氏体片变得不再完整,部分马氏体片边缘变得弯曲,部分马氏体发生了中脊断裂现象;观察马氏体片的亚结构表明,有些马氏体片的亚结构是孪晶与高密度位错共存,有些马氏体片的亚结构转变为高密度位错.分析认为强变形马氏体特殊亚结构的生成是由于奥氏体组织细化大大提高了母相强度,加大了相变切变阻力和强变形奥氏体母相中大量位错的引入破坏了母相晶格原子排列的空间规律性等原因造成的.
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| 关 键 词： | 超细晶粒 马氏体相变 微观结构 Fe-32％Ni合金 |
Martensite microstructure of Fe-32 %Ni alloy ultra-fine grained austenite |
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| HAN Bao-Jun,XU Zhou.Martensite microstructure of Fe-32 %Ni alloy ultra-fine grained austenite[J].Heat Treatment of Metals,2010,35(6). |
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| Authors: | HAN Bao-Jun XU Zhou |
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| Affiliation: | HAN Bao-Jun1,XU Zhou2(1.School of Chemistry and Life Science,Gannan Normal University,Ganzhou Jiangxi 341000,China,2.School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China) |
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| Abstract: | The sub-micrometer ultra-fine grained Fe-32%Ni alloy austenite was fabricated by multi-axial forging,and the martensite transformation take place by cryogenic treatment.The martensite microstructure of the ultra-fine grained Fe-32%Ni alloy was observed by transmission electron microscopy(TEM).The results indicate that the martensite flakes are not integrity and its edges are crooked,especially the mid-ridges of some martensite flakes are broken.The observation of martensite substructure indicates that some ... |
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| Keywords: | ultra-fine grains martensite transformation microstructure Fe-32%Ni alloy |
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