Microstructure and Texture Variations in High Temperature Titanium Alloy Ti65 Sheets with Different Rolling Modes and Heat Treatments

doi:10.3390/ma13112466

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	Microstructure and Texture Variations in High Temperature Titanium Alloy Ti65 Sheets with Different Rolling Modes and Heat Treatments; Microstructure and Texture Variations in High Temperature Titanium Alloy Ti65 Sheets with Different Rolling Modes and Heat Treatments
	Zhao, Ding 1; Fan, Jiangkun 1,2; Zhang, Zhixin 1,3; Liu, Xudong 1; Wang, Qingjiang 4; Chen, Zhiyong 4; Tang, Bin 1,2; Kou, Hongchao 1,2; Jia, Shuanxiao 5; Li, Jinshan 1,2
Corresponding Author	Fan, Jiangkun(jkfan@nwpu.edu.cn) ; Fan, Jiangkun(jkfan@nwpu.edu.cn)
	2020-06-01 ; 2020-06-01
Source Publication	MATERIALS ; MATERIALS
Volume	13 Issue:11 Pages:18
Abstract	Ti65 alloy (Ti-5.8Al-4.0Sn-3.5Zr-0.5Mo-0.4Si-0.3Nb-1.0Ta-0.8W-0.05C) is the newly developed high temperature titanium alloy optimized from Ti60 alloys. The long-term service temperature of the alloy is as high as 650 degrees C, which is unattainable with the previous high temperature titanium alloy. It has excellent strength and excellent creep resistance, and has great application prospects in the aerospace industry. In the current study, the evolution of microstructure and texture of Ti65 alloy sheets developed by unidirectional rolling (UDR) and cross rolling (CR) followed by solution and aging treatment was investigated. The microstructure of the UDR sample consists of equiaxed alpha p, lamellar alpha s and few elongated alpha p, and the texture is the combination of minor B-type and major T-type texture, with the main component of basal {0001} fiber texture and {0110}<2110>, respectively. Due to more active slip system resulted by transformed direction, the microstructure of the CR sample consists of more elongated alpha p, and the {0110}<0001> texture characterized as R-type texture forms in addition to B/T-type texture. With aging temperature increasing, the microstructures for both transform to duplex microstructure, and the thicknesses of lamellar alpha s increase. B-type texture becomes stronger, while T/R-type texture are weakened, which is caused by the combination of recrystallization, spheroidization, and variant selection. An abnormal increasing of T/R-type texture but constant B-type texture happens in the CR-600 sample, which is related to high recrystallization fraction. It is expected that the research results can provide useful references for the rolling of high temperature titanium alloy sheets and the precise control of microstructure/texture.; Ti65 alloy (Ti-5.8Al-4.0Sn-3.5Zr-0.5Mo-0.4Si-0.3Nb-1.0Ta-0.8W-0.05C) is the newly developed high temperature titanium alloy optimized from Ti60 alloys. The long-term service temperature of the alloy is as high as 650 degrees C, which is unattainable with the previous high temperature titanium alloy. It has excellent strength and excellent creep resistance, and has great application prospects in the aerospace industry. In the current study, the evolution of microstructure and texture of Ti65 alloy sheets developed by unidirectional rolling (UDR) and cross rolling (CR) followed by solution and aging treatment was investigated. The microstructure of the UDR sample consists of equiaxed alpha p, lamellar alpha s and few elongated alpha p, and the texture is the combination of minor B-type and major T-type texture, with the main component of basal {0001} fiber texture and {0110}<2110>, respectively. Due to more active slip system resulted by transformed direction, the microstructure of the CR sample consists of more elongated alpha p, and the {0110}<0001> texture characterized as R-type texture forms in addition to B/T-type texture. With aging temperature increasing, the microstructures for both transform to duplex microstructure, and the thicknesses of lamellar alpha s increase. B-type texture becomes stronger, while T/R-type texture are weakened, which is caused by the combination of recrystallization, spheroidization, and variant selection. An abnormal increasing of T/R-type texture but constant B-type texture happens in the CR-600 sample, which is related to high recrystallization fraction. It is expected that the research results can provide useful references for the rolling of high temperature titanium alloy sheets and the precise control of microstructure/texture.
Keyword	high temperature titanium alloy high temperature titanium alloy rolling mode rolling mode microstructure microstructure texture texture recrystallization recrystallization variant selection variant selection
Funding Organization	Major State Research Development Program of China ; Major State Research Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Basic Research Plan in Shaanxi Province of China ; Natural Science Basic Research Plan in Shaanxi Province of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities
DOI	10.3390/ma13112466 ; 10.3390/ma13112466
Indexed By	SCI ; SCI
Language	英语 ; 英语
Funding Project	Major State Research Development Program of China[2016YFB0701305] ; Major State Research Development Program of China[2016YFB0701305] ; National Natural Science Foundation of China[51801156] ; National Natural Science Foundation of China[51801156] ; Natural Science Basic Research Plan in Shaanxi Province of China[2019JM-584] ; Natural Science Basic Research Plan in Shaanxi Province of China[2019JM-584] ; Fundamental Research Funds for the Central Universities[3102019ZX014] ; Fundamental Research Funds for the Central Universities[3102019ZX014]
WOS Research Area	Materials Science ; Materials Science
WOS Subject	Materials Science, Multidisciplinary ; Materials Science, Multidisciplinary
WOS ID	WOS:000551495800042 ; WOS:000551495800042
Publisher	MDPI ; MDPI
Citation statistics	Cited Times:5[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/139975
Collection	中国科学院金属研究所
Corresponding Author	Fan, Jiangkun
Affiliation	1.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China 2.Natl & Local Joint Engn Res Ctr Precis Thermoform, Xian 710072, Peoples R China 3.Baoti Grp Ltd, Baoji 721014, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 5.Baoji Titanium Ind Co Ltd, Baoji 721014, Peoples R China
Recommended Citation GB/T 7714	Zhao, Ding,Fan, Jiangkun,Zhang, Zhixin,et al. Microstructure and Texture Variations in High Temperature Titanium Alloy Ti65 Sheets with Different Rolling Modes and Heat Treatments, Microstructure and Texture Variations in High Temperature Titanium Alloy Ti65 Sheets with Different Rolling Modes and Heat Treatments[J]. MATERIALS, MATERIALS,2020, 2020,13, 13(11):18, 18.
APA	Zhao, Ding.,Fan, Jiangkun.,Zhang, Zhixin.,Liu, Xudong.,Wang, Qingjiang.,...&Li, Jinshan.(2020).Microstructure and Texture Variations in High Temperature Titanium Alloy Ti65 Sheets with Different Rolling Modes and Heat Treatments.MATERIALS,13(11),18.
MLA	Zhao, Ding,et al."Microstructure and Texture Variations in High Temperature Titanium Alloy Ti65 Sheets with Different Rolling Modes and Heat Treatments".MATERIALS 13.11(2020):18.

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