GH4169合金的高温变形行为High temperature deformation behavior of GH4169 alloy
刘劲松,袁兆静,张海燕,程明,张士宏
摘要(Abstract):
通过高温拉伸实验对GH4169合金的加工硬化特性进行了研究,采用扫描电镜观察其断口处的组织形貌,分析了δ相对GH4169合金塑性变形的影响。结果表明,GH4169合金加工硬化规律基本遵循Hollomon公式;合金在不同热处理制度(固溶处理、时效2 h、时效5 h、时效32 h)下的应变硬化指数n分别为0.274、0.391、0.423和0.468;δ相的析出提高了合金的抗拉强度和屈服极限,而塑性表现为先上升后下降。
关键词(KeyWords): GH4169合金;δ相;高温拉伸;加工硬化
基金项目(Foundation): 国家自然科学基金重点项目(50834008);; 国家“973”项目(2010CB631200-G)
作者(Author): 刘劲松,袁兆静,张海燕,程明,张士宏
DOI: 10.13289/j.issn.1009-6264.2012.10.009
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