Effect of Surface Topography on Room Temperature Tensile Ductility of TiAl

IMR OpenIR

	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.
	2017-12-01
发表期刊	SPRINGER
ISSN	1047-4838
卷号	69 期号:12 页码:2583-2587
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.
部门归属	[lin, bochao ; liu, renci ; jia, qing ; cui, yuyou ; yang, rui] chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, liaoning, peoples r china ; [lin, bochao] univ chinese acad sci, 19a yuquan rd, beijing 100049, peoples r china
学科领域	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Mineralogy ; Mining & Mineral Processing
收录类别	SCI
语种	英语
WOS记录号	WOS:000416178400024
引用统计	被引频次：8[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/321006/78953
专题	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.