韩墨流,徐平伟,万明攀,梁益龙,杜剑平,梁宇.TA19钛合金中半等轴组织特征与拉伸性能研究[J].稀有金属材料与工程,2018,47(12):3768~3775.[Mo-liu Han,Ping-wei Xu,Ming-pan Wan,Yi-long Liang,Jiang-ping Du,Yu Liang.Study on the Semi-equiaxed Structure and Tensile Properties of TA19 Titanium Alloy[J].Rare Metal Materials and Engineering,2018,47(12):3768~3775.]
TA19钛合金中半等轴组织特征与拉伸性能研究
投稿时间:2018-03-08  修订日期:2018-03-26
中文关键词:  半等轴组织  元素扩散 力学性能  取向关系
基金项目:国家自然科学基金(No. 51461007 and No. 51761003);贵州省自然科学基金(No. [2015] 3012, No. [2014] 2003 and No.[2014]6012)
中文摘要:
      本文采用TA19合金加热到β相变点以上短时保温25-90s,得到了介于等轴组织与片层组织间的一种具有半等轴特征的过渡组织,研究了随保温时间的变化对半等轴组织演变规律及对力学性能的影响。结果表明半等轴组织主要是在β相变点以上短时保温时,β基体中的合金元素Mo向原等轴α相中扩散不均匀,冷却转变过程中初生等轴α相局部被β转变组织分割所形成。随保温时间的延长,半等轴特征逐渐被片层组织所取代,在保温温度为45s时,抗拉强度1219MPa,断面收缩率29%,伸长率14%,具有较好的强塑性。
Study on the Semi-equiaxed Structure and Tensile Properties of TA19 Titanium Alloy
英文关键词:Semi-equiaxed structure  Element diffusion  Mechanical Property  Orientation relationship
英文摘要:
      By heating up the Tβ temperature and then holding 25-90s, the semi- equiaxed structure, which is a transition structure between the equiaxed structure and the lamellar structure,is shaped. The influence of the change of heat holding time on the semi-equiaxed structure evolution law and mechanical properties is studied. Experimental results indicate that the formation of the semi-equiaxed structure is mainly because the element Mo into the β matrix diffused inhomogeneous into primary equiaxed α phase when specimens was kept above the Tβ temperature for a short time,And in the cooling process,the β transformain structure grow through the primary equiaxed α phase.With the prolongation of holding time,the semi-equiaxed structure are gradually replaced by lameller structure.When heated to 1015℃,hold 45s,the tensile strength is 1219MPa,the reduction of area is 29%,and the elongation is 14%,which has a better strength and plasticity.
作者单位E-mail
韩墨流 贵州大学材料与冶金学院 549723594@qq.com 
徐平伟 贵州大学材料与冶金学院  
万明攀 贵州大学材料与冶金学院  
梁益龙 贵州大学材料与冶金学院  
杜剑平 贵州省材料结构与强度重点实验室  
梁宇 贵州大学材料与冶金学院 xq.liangyu@126.com 
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