郭润江,孙衍乐,单默昆,付立铭,单爱党

• 1:上海交通大学材料科学与工程学院
• 2:上海交通大学环境科学与工程学院

摘要(Abstract)：

通过对镍基合金GH80A进行大变形异步与同步轧制,制备了纳米组织材料,研究了退火处理对纳米组织GH80A材料的组织与力学性能的影响。结果表明,大变形轧制后的材料的晶粒细化至约50 nm,其抗拉强度从646 MPa提升至1787 MPa,在700℃下进行退火处理后,抗拉强度可以达到2111 MPa;退火温度对取向影响不大。所制备的超细晶材料具有良好的组织热稳定性,在700℃下退火,晶粒尺寸约150 nm,在800℃下退火1 h,晶粒尺寸仍然能够保持在250 nm以下。分析认为,超细晶镍基GH80A材料的组织稳定性与强度的显著提高与γ'相的析出有直接关系。

关键词(KeyWords)： GH80A;大变形轧制;纳米晶;热处理;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家“十二五”水体污染控制与治理科技重大专项(2014ZX07214-002)

作者(Author): 郭润江,孙衍乐,单默昆,付立铭,单爱党

DOI: 10.13289/j.issn.1009-6264.2016.12.015

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