周伟,赵永庆,辛社伟,李倩,王欢,张思远.Ti5321钛合金BASCA处理不同冷却速度下的片层形态和性能研究[J].稀有金属材料与工程,2020,49(7):2314~2318.[Zhou Wei,ZHAO Yongqing,XIN Shewei,LI Qian,WANG Huan,ZHANG Siyuan.Study on Microstructure and Mechanical Properties of Ti5321 Titanium Alloy at Different Cooling Rates with BASCA treatment[J].Rare Metal Materials and Engineering,2020,49(7):2314~2318.]
Ti5321钛合金BASCA处理不同冷却速度下的片层形态和性能研究
投稿时间:2019-04-09  修订日期:2019-11-27
中文关键词:  钛合金,β热处理,机械性能,片层特征
基金项目:
中文摘要:
      为了研究冷却速度对新型高强韧钛合金Ti5321显微组织和力学性能的影响,本文研究了Ti5321合金在不同BASCA处理后的组织和力学性能。结果表明,Ti5321合金β区固溶后缓慢冷却过程中冷却速率对α片层尺寸有决定性影响。片层尺寸随着冷却速率的减小而增大,片层在长度方向的生长速率远快于厚度方向的生长速率。同时,随着冷却速度的降低,合金的强度降低。但损伤容限特性显示出强度的反向趋势。本试验中当冷却速度为0.5℃/min时,合金抗拉强度超过1200MPa、同时具有良好的断裂韧性(KIC≥65MPa.m1/2)。
Study on Microstructure and Mechanical Properties of Ti5321 Titanium Alloy at Different Cooling Rates with BASCA treatment
英文关键词:titanium alloy  β heat treatment  mechanical properties  lamellar morphology
英文摘要:
      In order to analyze the effect of cooling rate on lamellar morphology and mechanical properties during BASCA treatment in Ti5321 alloy, the lamellar morphology and mechanical properties of the titanium Ti5321 alloy under different BASCA treatment are comprehensively studied. The results show that the cooling rates have decisive influence on the alpha lamellar size formed at slow cooling process after β zone solution. The lamellar size of Ti5321 alloy keeps increase with the decrease of cooling rate, and the growth rate of lamellar in the length direction is much faster than that in the thickness direction. With the increase of cooling rate, the strength of the alloy is in-crease,but the fracture toughness decreases. The cooling rate of 0.5℃/min in this experiment is the optimal cool-ing way which the ultimate tensile strength of alloy can exceed 1200MPa with an excellent fracture tough-ness(KIC≥65MPa.m1/2).
作者单位E-mail
周伟 西北有色金属研究院 zhouwei2002563@163.com 
赵永庆 西北有色金属研究院  
辛社伟 西北有色金属研究院  
李倩 西北有色金属研究院  
王欢 西北有色金属研究院  
张思远 西北有色金属研究院  
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