Tailored Fully Lamellar Microstructure of a Newly Developed Mn-Containing beta-Solidifying gamma-TiAl Alloys Rolled Bar

doi:10.1007/s11837-022-05262-8

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	Tailored Fully Lamellar Microstructure of a Newly Developed Mn-Containing beta-Solidifying gamma-TiAl Alloys Rolled Bar
	Li, Xiaobing 1; Qian, Kun 1; Shu, Lei 1; Zhang, Mengshu 1; Chen, Bo 1; Liu, Kui 1,2
刊名	JOM
	2022-04-15
页码	11
ISSN号	1047-4838
DOI	10.1007/s11837-022-05262-8
通讯作者	Chen, Bo(chenbo@jihualab.ac.cn)
英文摘要	A low-cost Mn-containing beta-solidifying gamma-TiAl alloys Ti-44Al-4Mn-0.8Mo-0.1B-0.1C (at.%) alloy (named as TMM alloy) was invented. Rolled bars with a diameter of 12 mm were fabricated by conventional hot rolling, which was carried out directly from the ingot without the pre-forging and near-isothermal canned conditions. The microstructure and mechanical properties of as-rolled and heat-treated alloy bars were investigated. The rolled microstructure consists of a small amount of alpha(2)/gamma lamellar structure, while plenty of fine-grained gamma and beta(o) phases at colony boundaries. The tensile properties at room temperature were obviously improved after hot rolling by refined microstructure. At 800 degrees C, the plastic elongation can reach as high as 80.0% but with 452 MPa tensile strength due to the high amount of gamma and beta(o) phase at colony boundaries. The fully lamellar microstructure can be tailored via two-step heat treatment including solution and aging treatments. At 800 degrees C, the tensile strength, elongation, and reduction of the area were 709 MPa, 4.5%, and 7%, respectively, which was much higher than the available wrought TiAl alloys. This study serves as a completely new low-cost beta-solidifying gamma-TiAl alloy which can be continuously hot-rolled under conventional conditions.
资助项目	National Natural Science Foundation of China[51971215] ; Jihua Laboratory Scientific Research Project[X210291TL210]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering ; Mineralogy ; Mining & Mineral Processing
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000782733700003
资助机构	National Natural Science Foundation of China ; Jihua Laboratory Scientific Research Project
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/172894]
专题	金属研究所_中国科学院金属研究所
通讯作者	Chen, Bo
作者单位	1.Ji Hua Lab, 28 Isl Ring South Rd,Guicheng St, Foshan 528200, Guangdong, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiaobing,Qian, Kun,Shu, Lei,et al. Tailored Fully Lamellar Microstructure of a Newly Developed Mn-Containing beta-Solidifying gamma-TiAl Alloys Rolled Bar[J]. JOM,2022:11.
APA	Li, Xiaobing,Qian, Kun,Shu, Lei,Zhang, Mengshu,Chen, Bo,&Liu, Kui.(2022).Tailored Fully Lamellar Microstructure of a Newly Developed Mn-Containing beta-Solidifying gamma-TiAl Alloys Rolled Bar.JOM,11.
MLA	Li, Xiaobing,et al."Tailored Fully Lamellar Microstructure of a Newly Developed Mn-Containing beta-Solidifying gamma-TiAl Alloys Rolled Bar".JOM (2022):11.