应变量对TC17钛合金高温性能及片状α相演变的影响  

Influence of Deformation on High-temperature Tensile Properties and Lamellar Alpha Phase Evolution of TC17 Titanium Alloy

作　　者：边丽虹 朴顺南 曾卫东[2] 徐建伟[2] 

机构地区：[1]中国航发沈阳黎明航空发动机有限责任公司,辽宁沈阳110043 [2]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《钛工业进展》2017年第6期34-37,共4页Titanium Industry Progress

基　　金：教育部博士点基金项目(20136102110034)

摘　　要：在两相区对TC17钛合金进行了变形量分别为0、20%、40%、60%、80%的等温变形,同一制度热处理(820℃×4 h/WQ+630℃×8 h/AC)后,测试了400℃拉伸性能,观察了显微组织,研究α+β两相区应变量对TC17钛合金高温拉伸性能和片状α相演变影响研究。结果表明:TC17钛合金在两相区经历不同的应变量变形和同一热处理后,组织演变的主要特征是片状α相球化,球化分数随应变量的提高而增加;400℃拉伸强度和塑性则随着应变量提高而提高;定量分析α相球化分数与400℃拉伸性能的关系发现两者之间符合线性关系,通过数据拟合建立了抗拉强度、屈服强度、延伸率、断面收缩率与α相球化分数关系的数学表达式。Influence of deformation in α ＋ β phase field on tensile properties at high temperature and lamellar α phase evolution of TC17 titanium alloy were investigated in this paper.The results show that the main characterization of microstructure evolution is spheroidization behavior of the lamellar alpha.The spheroidization fraction increases with the increasing of strain.Furthermore,tensile strength and plasticity exhibited the increasing tendency with the increasing of strain.The quantitative analysis shows that there are linear relationships between tensile properties and spheroidization fraction.The linear equations of relationship between α phase spheroidization fraction,tensile strength,yield strength,elongation and the reduction of area can be established by fitting the data.

关 键 词：TC17钛合金 球化 400℃拉伸性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]