薛克敏,孙建辉,纪小虎,郭威威,李萍.高压扭转工艺对TA15钛合金组织和性能的影响[J].稀有金属材料与工程,2019,48(4):1189~1194.[Xue Kemin,Sun Jianhui,Ji Xiaohu,Guo Weiwei,Li Ping.Effect of High-pressure Torsion on Microstructure and Properties of TA15 Titanium Alloy[J].Rare Metal Materials and Engineering,2019,48(4):1189~1194.]
高压扭转工艺对TA15钛合金组织和性能的影响
投稿时间:2017-08-29  修订日期:2017-10-24
中文关键词:  TA15钛合金  高压扭转  显微组织  显微硬度
基金项目:国家自然科学基金项目(51575153,51175137)
中文摘要:
      通过高压扭转工艺制备不同扭转圈数的TA15试样,利用金相观察、X射线衍射分析和显微硬度测试,分析高压扭转工艺对TA15钛合金组织和性能的影响。结果表明,变形后试样显微组织沿径向分布不均匀,随着扭转圈数增加,组织中粗大的初生等轴α相逐渐减少,晶粒细化效果明显,材料在(200)晶面出现择优取向;高压扭转变形后,材料的亚晶尺寸减小,微观应变和位错密度显著增加;变形后试样的显微硬度显著提高,且随着扭转圈数的增加,硬度逐渐增加,扭转圈数大于4圈时,显微硬度值趋于饱和。
Effect of High-pressure Torsion on Microstructure and Properties of TA15 Titanium Alloy
英文关键词:TA15 titanium alloy  high- pressure torsion(HPT)  microstructure  microhardness
英文摘要:
      TA15 samples with different turning numbers were prepared by high-pressure torsion process. Using metallographic observation, X - ray diffraction analysis and microhardness test, the effects of high-pressure torsion on the microstructure and properties of TA15 titanium alloy were analyzed. The experimental results show that the microstructures of the specimens are not evenly distributed in the radial direction after deformation. With the increase of turning numbers, the coarse primary equiaxed α phase gradually decreases and the grain refinement effect is obvious. And the material appears preferential orientation in the (200) crystal. After the high-pressure torsional deformation, the size of the sub-crystal decreases, while the microstrain and dislocation density increase significantly. In addition, the microhardness of the deformed specimens increases remarkably. Moreover, the hardness increases with the number of torsion turns increasing. When the number of twists turns is greater than 4, the microhardness tends to a saturation value.
作者单位E-mail
薛克敏 合肥工业大学 xuekm0721@sian.com 
孙建辉 合肥工业大学  
纪小虎 合肥工业大学  
郭威威 合肥工业大学  
李萍 合肥工业大学 li_ping@hfut.edu.cn 
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