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材料导报  2024, Vol. 38 Issue (7): 22080020-6    https://doi.org/10.11896/cldb.22080020
  金属与金属基复合材料 |
BASCA热处理对TC10钛合金组织与断裂韧性的影响
张明玉, 运新兵*, 伏洪旺
大连交通大学连续挤压教育部工程研究中心,辽宁 大连 116028
Effect of BASCA Heat Treatment on Microstructure and Fracture Toughness of TC10 Titanium Alloy
ZHANG Mingyu, YUN Xinbing*, FU Hongwang
Engineering Research Center of Continuous Extrusion, Dalian Jiaotong University, Dalian 116028, Liaoning, China
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摘要 本工作对TC10钛合金进行BASCA热处理(β退火+缓慢冷却+时效),通过改变BA温度(β退火温度),研究BASCA热处理对TC10钛合金微观组织与断裂韧性的影响。结果表明:BA温度对合金微观组织与断裂韧性起到决定作用,随着BA温度升高,合金微观组织类型由等轴组织转变为片层组织,断裂韧性不断增加,最大值为77 MPa·m1/2。此外,研究了不同类型组织的裂纹尖端区域塑性变形量、裂纹扩展路径以及断口微观形貌,进一步揭示断裂机制。与片层组织相比,等轴组织的裂纹尖端区域塑性变形较大,裂纹扩展路径曲折程度较小。等轴组织的断口形貌光滑平顺,主要由韧窝构成;片层组织的断口形貌凹凸起伏明显,韧窝数量与尺寸均减小,并出现撕裂棱、空洞以及二次裂纹。
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张明玉
运新兵
伏洪旺
关键词:  TC10钛合金  BASCA热处理  微观组织  断裂韧性    
Abstract: In this work, TC10 titanium alloy was treated by BASCA heat treatment (β annealing+slow cooling+aging). The effect of BASCA heat treatment on the microstructure and fracture toughness of TC10 titanium alloy was studied by changing the BA temperature (β annealing tempe-rature). The results show that the BA temperature plays a decisive role in the microstructure and fracture toughness of the alloy. With the increase of BA temperature, the microstructure type changes from equiaxed structure to lamellar structure, and the fracture toughness continuously increases, the maximum value can reach 77 MPa·m1/2. In addition, the amount of plastic deformation at the crack tip region, crack propagation path and fracture micro-morphology of different types of microstructures were studied to further reveal the fracture mechanism. Compared with the lamellar structure, the plastic deformation of the crack tip region of the equiaxed structure is larger, and the crack propagation path is less tor-tuous. The fracture morphology of equiaxed structure is smooth, mainly composed of dimples. The fracture morphology of lamellar structure is obviously concave and convex. The number and size of dimples decrease, and tearing ridges, cavities and secondary cracks appear.
Key words:  TC10 titanium alloy    BASCA heat treatment    microstructure    fracture toughness
出版日期:  2024-04-10      发布日期:  2024-04-11
ZTFLH:  TG156.1  
基金资助: 国家自然科学基金(51675074);辽宁省教育厅项目(JDL2019001);大连市科技创新基金(2018J11CY027)
通讯作者:  运新兵,大连交通大学连续挤压教育部工程研究中心教授、博士研究生导师。分别于1992年、1995年在吉林工业大学获得学士和硕士学位,2006年在东北大学获得博士学位。主要从事金属塑性成形及数值模拟、连续挤压理论与技术等方面的研究。承担国家自然科学基金、国家科技支撑计划项目等10余项,获国家科技进步二等奖、中国有色金属工业科学技术一等奖,发表学术论文100余篇。yunxb@djtu.edu.cn   
作者简介:  张明玉,2011年6月本科毕业于吉林大学管理学院获得管理学学士学位,2019年6月硕士毕业于昌吉学院物理系获得工学硕士学位。现为大连交通大学材料科学与工程学院博士研究生,在运新兵教授的指导下进行研究。目前主要研究领域为钛合金塑性成形及热处理。
引用本文:    
张明玉, 运新兵, 伏洪旺. BASCA热处理对TC10钛合金组织与断裂韧性的影响[J]. 材料导报, 2024, 38(7): 22080020-6.
ZHANG Mingyu, YUN Xinbing, FU Hongwang. Effect of BASCA Heat Treatment on Microstructure and Fracture Toughness of TC10 Titanium Alloy. Materials Reports, 2024, 38(7): 22080020-6.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.22080020  或          https://www.mater-rep.com/CN/Y2024/V38/I7/22080020
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