Effect of Surface Topography on Room Temperature Tensile Ductility of TiAl

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	Effect of Surface Topography on Room Temperature Tensile Ductility of TiAl
	Lin, Bochao; Liu, Renci; Jia, Qing; Cui, Yuyou; Yang, Rui; Yang, R (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
刊名	SPRINGER
	2017-12-01
卷号	69 期号:12 页码:2583-2587
ISSN号	1047-4838
英文摘要	Room temperature tensile ductility of extruded Ti-47Al-1.5Nb-1Cr-1Mn-0.5B (at.%) with different surface topographies was investigated. Tensile specimens were subjected to grinding with sandpaper of different grits and electrolytic polishing to achieve different surface topographies. Surface morphology/topography and tensile ductility of different surface preparations were compared. Results show that for ground samples, when the mean amplitude deviation (Ra) exceeds 0.1 mu m, initiation of tensile failure transits from the sample interior to surface, and tensile fracture strain decreases linearly with increasing Ra. Electrolytic polishing improves the surface topography of TiAl not only by reducing Ra, but also by modifying the amplitude shape and distribution of the surface, and it therefore increases ductility. The present work suggests that surface amplitude deviation (Ra), skewness (Rsk) and kurtosis (Rku) are appropriate parameters to evaluate the surface topography of intermetallic materials with limited ductility such as TiAl.; Room temperature tensile ductility of extruded Ti-47Al-1.5Nb-1Cr-1Mn-0.5B (at.%) with different surface topographies was investigated. Tensile specimens were subjected to grinding with sandpaper of different grits and electrolytic polishing to achieve different surface topographies. Surface morphology/topography and tensile ductility of different surface preparations were compared. Results show that for ground samples, when the mean amplitude deviation (Ra) exceeds 0.1 mu m, initiation of tensile failure transits from the sample interior to surface, and tensile fracture strain decreases linearly with increasing Ra. Electrolytic polishing improves the surface topography of TiAl not only by reducing Ra, but also by modifying the amplitude shape and distribution of the surface, and it therefore increases ductility. The present work suggests that surface amplitude deviation (Ra), skewness (Rsk) and kurtosis (Rku) are appropriate parameters to evaluate the surface topography of intermetallic materials with limited ductility such as TiAl.
学科主题	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Mineralogy ; Mining & Mineral Processing
语种	英语
公开日期	2018-01-10
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78953]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yang, R (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Lin, Bochao,Liu, Renci,Jia, Qing,et al. Effect of Surface Topography on Room Temperature Tensile Ductility of TiAl[J]. SPRINGER,2017,69(12):2583-2587.
APA	Lin, Bochao,Liu, Renci,Jia, Qing,Cui, Yuyou,Yang, Rui,&Yang, R .(2017).Effect of Surface Topography on Room Temperature Tensile Ductility of TiAl.SPRINGER,69(12),2583-2587.
MLA	Lin, Bochao,et al."Effect of Surface Topography on Room Temperature Tensile Ductility of TiAl".SPRINGER 69.12(2017):2583-2587.