Abstract: In this work, hot deformation in the single β phase region was performed to modify the distribution state of the borides in Ti-40Al-8Nb-0.5B and Ti-40Al-8Nb-1B alloys (at%), respectively. Special attention was paid to the orientation behavior of borides and its effect on the microstructure of the α phase. The results showed that the distribution state of the borides in these two alloys was significantly influenced by the hot defor-mation and boron content. The borides distributed randomly in the undeformed samples of Ti-40Al-8Nb-0.5B and Ti-40Al-8Nb-1B alloys, whereas the borides in the deformed Ti-40Al-8Nb-0.5B alloys presented a [100] fiber texture and the borides showed randomly distributed orientations in the deformed Ti-40Al-8Nb-1B alloys. This phenomenon is attributed to the rigid rotation of the borides and the interactions between the adjacent borides. After the subsequent β→α transformation, the α phase in Ti-40Al-8Nb-0.5B alloys exhibited a <1120> and <1010> double-fiber texture, whereas the α phase distributed randomly in Ti-40Al-8Nb-1B alloys, which is resulted from the microstructure heredity among the β phase, α phase and borides. The present study provides a new insight for the control of lamellar structure orientation in β-solidifying γ-TiAl alloys.
作者简介: 杨光,工学博士,机电工程学院,材料加工工程系,副教授,硕士生导师。 2009年于四川大学金属材料工程获得学士学位, 2016年11月毕业于西北工业大学材料加工工程专业并获得工学博士学位。2016年在陕西科技大学机电工程学院材料加工工程系进行教学科研工作。主持和参与国家级和省部级等项目9项,其中主持国家自然科学基金青年项目1项和陕西省自然科学基础研究计划1项,陕西科技大学 “引进博士科研启动基金” 项目1项,参与国家自然科学基金、“973”子课题、航空基金等项目6项。在国际材料类期刊Acta Materialia,Journal of Alloys and Compounds,Intermetallics等高水平期刊发表论文30余篇。申请国家发明专利7项,已授权3项。研究领域主要包括轻金属的显微组织演化及控制、金属材料的变形行为及组织表征等。 田普建,陕西科技大学副教授,1995年9月至1999年6月,在西安交通大学材料成型及控制工程学士学位,1999年7月至今在陕西科技大学任教。其中2004年9月至2007年6月在陕西科技大学获得材料加工工程硕士学位,目前在陕西科技大学博士在读。以第一作者在学术期刊上发表论文10余篇,主编高校教材2部,参编教材、著作10余部。负责完成省级、厅局级研究项目3项,作为主要完成人参与国家级、省部级项目7项。研究工作主要围绕复合材料的制备、性能控制及加工成型工艺的基础理论和应用研究。
引用本文:
杨光, 田普建, 葛正浩, 王义飞, 杨肖肖, 刘洁, 刘延辉, 宋文杰. β型γ-TiAl合金中硼化物的取向及其对α相的影响[J]. 材料导报, 2020, 34(8): 8113-8118.
YANG Guang, TIAN Pujian, GE Zhenghao, WANG Yifei, YANG Xiaoxiao, LIU Jie, LIU Yanhui, SONG Wenjie. Orientation Behavior of Borides in β-solidifying γ-TiAl Alloys and Its Effect on the Microstructure of the α Phase. Materials Reports, 2020, 34(8): 8113-8118.
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