A Study of Microstructure and Surface Hardness of Parts Fabricated by Laser Direct Metal Deposition Process

摘要：

This paper presents an investigation on the microstructure and surface hardness of the parts fabricated by laser assisted Direct Metal Deposition (DMD) technology. A series of engineering metallic alloy powders were used in the DMD process to produce simple 3D geometric structures. The alloy powders investigated include: 316L stainless steel, 420 Stainless Steel, Stellite(R) 6, tool steel (H13), Cholmoloy (Ni Based alloy), and Aluminium Bronze. These were chosen due to their frequent application in engineering parts and components. The microstructure and hardness values have been compared to those of the wrought products (as annealed) as reported in the SAE standards, Heat treaters guide to metals ASM international, and material data sheets supplied by the materials manufacturers. A significant difference is reported in both hardness and microstructure of the laser deposited samples compared to those of the wrought form.

关键词： Laser Direct Metal Deposition Materials hardness microstructure

作者: Mehdi Soodi Milan Brandt Syed Masood

作者单位: IRIS,Faculty of Engineering & Industrial Sciences,Swinburne University of Technology,Australia School of Aerospace,Mechanical and Manufacturing Engineering,RMIT University,Victoria,Australia

会议类型: 国际会议

会议名称: 2010 International Conference on Material and Manufacturing Technology(2010材料与制造技术国际会议 ICMMT2010)

会议地点: 重庆

会议语种:英文

页码: 648-651

在线出版日期: 2010-09-17（万方平台首次上网日期，不代表论文的发表时间）