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OALib Journal期刊
ISSN: 2333-9721
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Ni43Co7Mn41Sn9高温形状记忆合金薄带的结构和相变
DOI: 10.3724/SP.J.1037.2013.00155, PP. 976-980
Keywords: Ni-Co-Mn-Sn,高温形状记忆合金,薄带,快速凝固,马氏体相变
Abstract:
采用单辊快淬法制备了名义成分为Ni43Co7Mn41Sn9的高温形状记忆合金薄带,并对其微观组织结构和马氏体相变进行了研究.结果表明,薄带发生一步热弹性马氏体相变,经高温热处理后马氏体相变温度达到160℃.制备态薄带的晶粒为微米级,大小不一,介于2—18μm之间,与块体母合金相比晶粒明显细化,且大部分晶粒沿垂直薄带表面方向生长.室温下,薄带(消除内应力后)为正方结构的非调制马氏体,马氏体变体内部由孪晶亚结构组成.热处理后薄带的相变温度有所下降,但随着热处理温度的升高基本保持不变.
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