FGH96合金动态再结晶行为的研究Investigation on dynamic recrystallization of FGH96 powder metallurgy superalloy
刘建涛,张义文,陶宇,刘国权,胡本芙
摘要(Abstract):
利用Gleeble-1500热模拟试验机对FGH96合金在不同热变形制度下的动态再结晶行为进行了研究。结果表明:在较高应变速率下(>2×10-3s-1),合金流变曲线呈明显的动态再结晶特征,低应变速率下(5×10-4s-1)呈现明显的动态回复特征;变形温度、应变速率和应变量对获得细晶组织都有重要的影响,但应变速率对动态再结晶晶粒大小影响最为显著,动态再结晶晶粒的平均晶粒尺寸大小-D与Z参数满足如下关系:ln-D=7.617-0.0134lnZ;利用加工硬化率和应变的关系曲线确定了该合金的稳态应变sε,建立了该合金的动态再结晶状态图。
关键词(KeyWords): FGH96合金;热变形;动态再结晶
基金项目(Foundation): “十五”民口配套重大研究项目(MKPT-01-127ZD)
作者(Author): 刘建涛,张义文,陶宇,刘国权,胡本芙
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