Microstructure Evolution of Stainless Steel during Laser Metal Deposition Shaping
Laser Metal Deposition Shaping (LMDS) is a process that fuses gas delivered metal powders within a focal zone of a laser beam to produce fully dense, 3dimensional metal components. A variety of materials have been processed with LMDS, ranging from stainless steel to superailoy. To evaluate the processing parameters and resulting microstructures, solidification studies have been performed on defined alloy systems. For example, solidification cooling rates and growth velocities have been determined based upon secondary dendrite arm spacings formed during solidification in stainless steel. Corresponding to the great change of cooling rates, growth rates vary dramatically. As a result, process definition has been developed based upon the microstructure evolution during solidification.
Laser Metal Deposition Shaping (LMDS) metal components microstructure evolution cooling rates growth velocities
Kai Zhang Weijun Liu
School of Mechanical Engineering Shenyang University of Technology Shenyang 110178,China Shenyang Institute of Automation Chinese Academy of Sciences Shenyang 110016,China
国际会议
长沙
英文
1037-1040
2009-04-11（万方平台首次上网日期，不代表论文的发表时间）