XRD and OM were used to study the phase constitution and solidified structure of the Ti–6Al–4V alloys prepared by laser multi–layer deposited pre–alloyed powder and blended elemental powder. It was found that the deposited layer obtained by using the pre–alloyed powder consists mainly of the epitaxial columnar grains, and the solidified structures change from the columnar grains to the equiaxed grains with increasing laser power. Meanwhile, the solidified structures of the deposited layer obtained by using the blended elemental powders change from large equiaxed grains to epitaxial columnar grains with increasing laser power from 1600 W to 2700 W. Laser scanning velocity has little effect on the morphology of the prior grains in the deposited layer obtained by using the blended elemental powders. The influence of mixing enthalpy on the structures of Ti–6Al–4V alloy was discussed also.
ZHANG Feng-Yang
,
TAN Hua
,
CHEN Jing
,
LIN Xin
,
HUANG Wei-Dong
. INFLUENCE OF MIXING ENTHALPY ON THE MICROSTRUCTURE OF LASER MULTILAYER DEPOSITED Ti–6Al–4V ALLOY[J]. Acta Metall Sin, 2012
, 48(2)
: 159
-163
.
DOI: 10.3724/SP.J.1037.2011.00351
[1] Huang W D, Lin X, Chen J, Liu Z X, Li Y M. Laser Solid Forming Technology. Xi’an: Northwestern Polytechnical University Press, 2007: 1
(黄卫东, 林 鑫, 陈静, 刘振侠, 李延民. 激光立体成形. 西安: 西北工业大学出版社, 2007: 1)
[2] Collins P C, Banerjee R, Banerjee S, Fraser H L. Mater Sci Eng, 2003; A352: 118
[3] Banerjee R, Collins P C, Bhattacharyya D, Banerjee S, Fraser H L. Acta Mater, 2003; 51: 3277
[4] Banerjee R, Bhattacharyya D, Collins P C, Viswanathan G B, Fraser H L. Acta Mater, 2004; 52: 377
[5] Genc A, Banerjee R, Hill D, Fraser H L. Mater Lett, 2006; 60: 859
[6] Nag S, Banerjee R, Fraser H L. Acta Biomater, 2007; 3: 369
[7] Xu X J, Lin X, Huang W D, Wang L. Acta Metall Sin, 2010; 46: 1081
(许小静, 林 鑫, 黄卫东, 王亮. 金属学报, 2010; 46: 1081)
[8] Xu X J, Lin X, Yang M C, Chen J, Huang W D. Acta Metall Sin, 2008; 44: 1013
(许小静, 林 鑫, 杨模聪, 陈静, 黄卫东. 金属学报, 2008; 44: 1013)
[10] Tan H, Chen J, Zhang F Y, Lin X, Huang W D. Rare Met Mater Eng, 2009; 38: 574
(谭华, 陈静, 张凤英, 林鑫, 黄卫东. 稀有金属材料与工程, 2009; 38: 574)
[11] Tan H, Chen J, Lin X, Zhang F Y, Huang W D. J Mater Process Technol, 2008; 198: 454
[12] Lin X, Li Y M, Wang M, Feng L P, Chen J, Huang W D. Sci China, 2003; 33E: 577
(林鑫, 李延民, 王猛, 冯莉萍, 陈静, 黄卫东. 中国科学, 2003; 33E: 577)
[13] Zhang B W, HuW Y, Shu X L. Theory of Embedded Atom Method and Its Application to Materials Science: Atomic Scale Materials Design Theory. Changsha: Hunan University
Press, 2003: 1
(张邦维, 胡望宇, 舒小林. 嵌入原子方法理论及其在材料科学中的应用: 原子尺度材料设计理论. 长沙: 湖南大学出版社, 2003: 1)
[14] Guo J J, Su Y Q. Analysis of Thermodynamics and Kinetics in Melting Process of Titanium Alloy. Harbin: Harbin Institute of Technology Press, 1998: 46
(郭景杰, 苏彦庆. 钛合金ISM熔炼过程热力学与动力学分析. 哈尔滨: 哈尔滨工业大学出版社, 1998: 46)
