Effect of heat treatment on the crystallographic orientation evolution in a near-alpha titanium alloy Ti60

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	Effect of heat treatment on the crystallographic orientation evolution in a near-alpha titanium alloy Ti60
	Zhao, Z. B. ; Wang, Q. J. ; Liu, J. R. ; Yang, R.
刊名	ACTA MATERIALIA
	2017-06-01
卷号	131 页码:305-314
关键词	Titanium alloys Texture Phase boundary energy Annealing Electron backscattered diffraction (EBSD)
ISSN号	1359-6454
通讯作者	Wang, QJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
中文摘要	The crystallographic orientation of equiaxed primary alpha (alpha p) phase is one of the main factors that determine the final texture/microtexture and mechanical properties for near-alpha titanium alloys. By annealing a forged Ti60 alloy pancake at 1030 and 1040 degrees C in the alpha+beta two-phase field, two homogeneous bimodal microstructures were obtained, the intensity of secondary alpha in the (0001) pole figure increasing with the annealing temperature. In this study, the influence of annealing temperature on the crystallographic orientation evolution in the pancake was studied using an electron backscattered diffraction analysis method. In particular, a misorientation angle theta associated with (beta Delta J beta(BOR)) that could quantitatively evaluate the deviation of the orientation relationship (OR) between alpha(p) and the surrounding 13 grains from Burgers OR was used to understand the role of the alpha(p) phase, which is considered as an anisotropic precipitate, in the texture evolution during annealing in the two-phase field. It was found that the alpha(p) grains with small theta are more readily preserved during the annealing, while their pinning effect is relatively small, resulting in faster growth of the neighboring 13 grains. A possible effect of heterogeneous local orientation distribution on the microstructure during the annealing process is also discussed. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
学科主题	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
收录类别	SCI
语种	英语
公开日期	2017-08-17
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78111]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Zhao, Z. B.,Wang, Q. J.,Liu, J. R.,et al. Effect of heat treatment on the crystallographic orientation evolution in a near-alpha titanium alloy Ti60[J]. ACTA MATERIALIA,2017,131:305-314.
APA	Zhao, Z. B.,Wang, Q. J.,Liu, J. R.,&Yang, R..(2017).Effect of heat treatment on the crystallographic orientation evolution in a near-alpha titanium alloy Ti60.ACTA MATERIALIA,131,305-314.
MLA	Zhao, Z. B.,et al."Effect of heat treatment on the crystallographic orientation evolution in a near-alpha titanium alloy Ti60".ACTA MATERIALIA 131(2017):305-314.