The microstructural modification, lattice defects and mechanical properties of hydrogenated dehydrogenated alpha-Ti

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	The microstructural modification, lattice defects and mechanical properties of hydrogenated dehydrogenated alpha-Ti
	C. B. Zhang; Q. Kang; Z. H. Lai; R. Ji
	1996
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	44 期号:3 页码:1077-1084
摘要	The effects of hydrogen treatment on the microstructure, lattice defects and mechanical properties of alpha-Ti were investigated by optical and electron microscopy, positron annihilation techniques and mechanical testing experiments. It is found that there are always two types of hydrides: the ordered f.c.t. gamma-hydride and f.c.c. delta-hydride, in hydrogenated alpha-Ti at room temperature. The observation of the former is a new result in the Ti-H system with relatively high hydrogen content ([H] approximate to 32.6 at.%). However, the amount of gamma-hydride appears to decrease when [H] is progressively increased. The amount of defects in the hydrogenated specimens is much more than in the dehydrogenated specimens. The defects generated by hydride formation are mainly dislocations and they become vacancy-like defects as the hydrogen content increases. The amount and morphology of the hydrides and the types of defects produce a significant effect on the microstructure of the matrix after dehydrogenation. Thus, by carefully controlling the hydrogen content one can improve the tensile and fatigue properties of alpha-Ti after dehydrogenation.
部门归属	acad sinica,int ctr mat phys,shenyang 110015,peoples r china. northeastern univ,coll sci,dept mat sci,shenyang 110006,peoples r china.;zhang, cb (reprint author), acad sinica,inst met res,atom imaging solids lab,shenyang 110015,peoples r china
关键词	Ti-6al-4v Tensile Alloys
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38474
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. B. Zhang,Q. Kang,Z. H. Lai,et al. The microstructural modification, lattice defects and mechanical properties of hydrogenated dehydrogenated alpha-Ti[J]. Acta Materialia,1996,44(3):1077-1084.
APA	C. B. Zhang,Q. Kang,Z. H. Lai,&R. Ji.(1996).The microstructural modification, lattice defects and mechanical properties of hydrogenated dehydrogenated alpha-Ti.Acta Materialia,44(3),1077-1084.
MLA	C. B. Zhang,et al."The microstructural modification, lattice defects and mechanical properties of hydrogenated dehydrogenated alpha-Ti".Acta Materialia 44.3(1996):1077-1084.