贺志荣,叶俊杰

• 1:陕西理工大学材料科学与工程学院

摘要(Abstract)：

用拉伸试验、光学显微镜和扫描电镜等研究了退火温度对Ti-50.8Ni-0.1Zr合金超弹性、形状记忆效应、拉伸性能、显微组织和断口形貌的影响。结果表明:350℃和600～700℃退火态Ti-50.8Ni-0.1Zr合金呈现超弹性(SE),350℃退火态合金SE的稳定性最好;400～550℃退火态合金呈现形状记忆效应(SME),450℃退火态合金SME的稳定性最好。随退火温度升高,合金的平台应力先降后升,分别在500℃和650℃达到最小值156 MPa和最大值486 MPa,残余应变先升高后降低,分别在700℃和450℃达到最小值0.0078%和最大值5.6148%。350～550℃退火态合金的强度高于600～700℃退火态,但塑性低于后者;450℃退火后合金的抗拉强度达到最大值,为1493 MPa, 700℃退火后合金的伸长率达到最大值,为39.1%。退火态Ti-50.8Ni-0.1Zr合金的断口形貌呈韧窝状,属微孔聚集型韧性断裂。随退火温度升高,韧窝尺寸增加,合金塑性提高。

关键词(KeyWords)： Ti-50.8Ni-0.1Zr合金;形状记忆合金;退火温度;形状记忆效应;超弹性

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2016YFE0111400)

作者(Author): 贺志荣,叶俊杰

DOI: 10.13289/j.issn.1009-6264.2020-0443

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