变形量对TA15钛合金组成相形态和性能的影响  

Effect of deformation degree on the morphology and mechanical property of constituent phases in TA15 titanium alloy

作　　者：吉喆[1] 杨合[1] 李宏伟[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,材料科学与工程学院,西安710072

出　　处：《塑性工程学报》2014年第2期20-24,共5页Journal of Plasticity Engineering

基　　金：国家重点基础研究发展计划资助项目(2010CB731701);国家自然科学基金重点基金资助项目(50935007);"111"引智计划项目(B08040)

摘　　要：采用等温压缩实验研究变形量对TA15钛合金中初生α相和转变β基体形态的影响,并通过纳米压痕实验分析变形量对初生α相和转变β基体微观硬度的影响。结果表明,在大变形量条件下,初生α相明显球化,且沿垂直于压缩方向排列;不同变形量下二次α相均匀分布于转变β基体中;三次α相的出现取决于加热流程,与变形量无关。初生α相的硬度不受变形量影响,转变β基体的硬度随着变形量的增加而增加。Isothermal compression experiments were carried out to investigate the morphology of primary αphase and transformedβmatrix at different deformation degrees . Nano indentation test was used to analyze the variation of the hardness of primary αphase and transformed βmatrix with deformation degrees . The results show that the spheroidization of the primary αphase is in-tensified and the primary αelongates in the plane perpendicular to the compression axis at large deformation degree . Secondary αphase regularly and finely distributes in the transformed βmatrix , and tertiary αphase exists in the retained βphase at different deformation degrees . The deformation degree has no effect on the hardness of primary α. The hardness of transformed βmatrix increases with the increase of deformation degree .

关 键 词：T A15钛合金 变形量 组成相 形态 性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]