Effect of W Content on the Phase Transformation Behavior in Ti-42Al-5Mn-<i>x</i>W Alloy

doi:10.11900/0412.1961.2022.00119

IMR OpenIR

	Effect of W Content on the Phase Transformation Behavior in Ti-42Al-5Mn-xW Alloy
	Li Xiaobing 1; Qian Kun 1; Shu Lei 1; Zhang Mengshu 1; Zhang Jinhu 2; Chen Bo 1; Liu Kui 1
通讯作者	Chen Bo(chenbo@jihualab.ac.cn)
	2023-10-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	59 期号:10 页码:1401-1410
摘要	Advanced intermetallic beta-solidifying gamma-TiAl-based alloys have various potential applications in the aerospace and automobile industries due to their low density, functionality at higher temperatures, and high specific strength/modulus. The crucial aspect that needs to be considered when developing a new beta-solidifying gamma-TiAl alloy is to clarify the influence law of beta-stabilizer elements on the phase transformation behavior of gamma-TiAl alloys. In this work, the impact of W contents (0.5%-1.0%, atomic fraction) on the phase transformation behavior and microstructure characteristics of Ti-42Al-5Mn-xW (atomic fraction) alloy with low cost and superior temperature workability was systematically investigated. The findings demonstrate that there were minor changes in the beta-phase single region temperature (T-beta) and gamma phase solvus temperature (T gamma-solv); furthermore, the eutectoid reaction temperature (T-eut) increases with the W content from 0.5% to 1.0%. Addition of W influences the solid phase transformation pathway to a certain extent. When the concentration of W increases to 0.5%, the equilibrium phase of the alloy at near service temperature gradually changes from alpha(2) + gamma + Laves to beta(o) + alpha(2) + gamma + Laves. Additionally, W addition will also have a substantial effect on the lamellar microstructure. The volume fraction of lamellar microstructure considerably decreased after alloying with (0.5%-1.0%)W for Ti-42Al-5Mn alloy when being treated in the (gamma + alpha + beta) triple-phase region followed by furnace cooling. Increasing the W content to 0.8% and 1.0% results in the development of gamma and beta(o) grain phases with almost complete removal of alpha(2)/gamma lamellar structures. However, the W-free and W-bearing Ti-42Al-5Mn alloys show near complete lamellar structures when treated in (alpha + beta) two-phase region followed by furnace cooling. Furthermore, when the content of W increased from 0.5% to 1.0%, an equiaxed grain structure with refined lamellar colonies is typically obtained.
关键词	TiAl alloy W content phase transformation lamellar structure grain refinement
DOI	10.11900/0412.1961.2022.00119
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001087007200011
出版者	SCIENCE PRESS
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/178031
专题	中国科学院金属研究所
通讯作者	Chen Bo
作者单位	1.Ji Hua Lab, Dept Mat Sci & Technol Res, Foshan, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li Xiaobing,Qian Kun,Shu Lei,et al. Effect of W Content on the Phase Transformation Behavior in Ti-42Al-5Mn-xW Alloy[J]. ACTA METALLURGICA SINICA,2023,59(10):1401-1410.
APA	Li Xiaobing.,Qian Kun.,Shu Lei.,Zhang Mengshu.,Zhang Jinhu.,...&Liu Kui.(2023).Effect of W Content on the Phase Transformation Behavior in Ti-42Al-5Mn-xW Alloy.ACTA METALLURGICA SINICA,59(10),1401-1410.
MLA	Li Xiaobing,et al."Effect of W Content on the Phase Transformation Behavior in Ti-42Al-5Mn-xW Alloy".ACTA METALLURGICA SINICA 59.10(2023):1401-1410.