Microstructure and Mechanical Properties of Laser Metal Deposited Ti-6Al-4V
Laser metal deposition (LMD) is a near net shape manufacturing process in which the final shape of a part or component is built layer-by-layer. The energy of a laser beam is used to melt a wire of the selected pre-alloyed material onto a substrate or work piece. In the present study, the mechanical properties of laser metal deposited Ti-6Al-4V have been evaluated with respect to the yield strength, ultimate tensile strength, ductility and low cycle fatigue at room temperature and at 200℃ In addition,fractographic and metallographic studies were carried out in order to correlate the mechanical behaviour with grain morphology and microstructure. The yield strength, ultimate tensile strength, ductility and the low cycle fatigue properties of LMD material were all better than or equal to the corresponding mechanical properties of standard cast Ti-6Al-4V material. It was also found that defects,such as pores and surface irregularities, significantly reduce the fatigue life of LMD Ti-6Al4V material,leading to premature fracture when present.
Laser metal deposition (LMD) free form fabrication (FFF) mechanical properties low cycle fatigue Tir6Al-4V
Pia Akerfeldt Robert Pederson Marta-Lena Antti
Division of Engineering Materials,Lule(a) University of Technology,S-9 7181 Lule(a),Sweden Division of Engineering Materials,Lule(a) University of Technology,S-9 7181 Lule(a),Sweden Departmen
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
1730-1734
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）