Microstructure and Mechanical Properties of Ti-6AI-4V by Electron Beam Rapid Manufacturing

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	Microstructure and Mechanical Properties of Ti-6AI-4V by Electron Beam Rapid Manufacturing
其他题名	Microstructure and Mechanical Properties of Ti-6AI-4V by Electron Beam Rapid Manufacturing
	Suo Hongbo 1; Chen Zheyuan 2; Liu Jianrong 3; Gong Shuili 2; Xiao Jianzhong 1
	2014
发表期刊	Rare Metal Materials and Engineering
ISSN	1002-185X
卷号	43 期号:4 页码:780-785
摘要	Electron beam rapid manufacturing (EBRM) is a novel layer-additive manufacturing process which was developed to directly fabricate metal parts from computer aided design (CAD) data. The present study was conducted to evaluate the microstructure and the mechanical properties of Ti-6Al-4V by EBRM. Results show that typical microstructures exhibit large columnar β grains nucleated at the substrate and grew epitaxially along the height direction of deposits through many deposition layers, and alternately light and dark banded textures at layer-layer and bead-bead interfaces have been also found due to complex thermal history during deposition process. As a result, the tensile properties of the as-deposited and the as-annealed deposits exhibit distinct anisotropy. The strength in X and Y directions are similar and markedly higher than that in Z. No significant impact of annealing treatment has been found on room temperature tensile properties. Hot isostatic pressing (HIP) treatment obviously decreases the dispersion of the high cycle fatigue data and improves both ductility and toughness, while at the expense of the tensile strength. The tensile properties of the as-deposited and as-annealed Ti-6Al-4V by EBRM can meet the mechanical property requirements of AMS4999 standard, but can not fully meet the requirements of HB5432 standard.
其他摘要	Electron beam rapid manufacturing (EBRM) is a novel layer-additive manufacturing process which was developed to directly fabricate metal parts from computer aided design (CAD) data. The present study was conducted to evaluate the microstructure and the mechanical properties of Ti-6Al-4V by EBRM. Results show that typical microstructures exhibit large columnar β grains nucleated at the substrate and grew epitaxially along the height direction of deposits through many deposition layers, and alternately light and dark banded textures at layer-layer and bead-bead interfaces have been also found due to complex thermal history during deposition process. As a result, the tensile properties of the as-deposited and the as-annealed deposits exhibit distinct anisotropy. The strength in X and Y directions are similar and markedly higher than that in Z. No significant impact of annealing treatment has been found on room temperature tensile properties. Hot isostatic pressing (HIP) treatment obviously decreases the dispersion of the high cycle fatigue data and improves both ductility and toughness, while at the expense of the tensile strength. The tensile properties of the as-deposited and as-annealed Ti-6Al-4V by EBRM can meet the mechanical property requirements of AMS4999 standard, but can not fully meet the requirements of HB5432 standard.
关键词	电子束快速制造显微组织力学性能
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:5131985
引用统计	被引频次：12[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/146410
专题	中国科学院金属研究所
作者单位	1.华中科技大学 2.Beijing Aeronautical Manufacturing Technology Research Institute 3.中国科学院金属研究所
推荐引用方式 GB/T 7714	Suo Hongbo,Chen Zheyuan,Liu Jianrong,et al. Microstructure and Mechanical Properties of Ti-6AI-4V by Electron Beam Rapid Manufacturing[J]. Rare Metal Materials and Engineering,2014,43(4):780-785.
APA	Suo Hongbo,Chen Zheyuan,Liu Jianrong,Gong Shuili,&Xiao Jianzhong.(2014).Microstructure and Mechanical Properties of Ti-6AI-4V by Electron Beam Rapid Manufacturing.Rare Metal Materials and Engineering,43(4),780-785.
MLA	Suo Hongbo,et al."Microstructure and Mechanical Properties of Ti-6AI-4V by Electron Beam Rapid Manufacturing".Rare Metal Materials and Engineering 43.4(2014):780-785.