Compression Fracture Behavior of Additive Manufactured Ti-6Al-4V Porous Material
Additive Manufacturing(AM)is a versatile process for various materials with complicated geometries and architectures.For AM metallic materials,selective laser melting(SLM)is a predominant means of fabricating not only high-density alloys but also porous ones.SLM Ti-6Al-4V porous material had been widely examined in the literature for biomedical use.The objective of this research was to study the compression fracture behavior of SLM Ti-6Al-4V porous material with a new cuboctahedron cell.The effects of hot isostatic pressing(HIP)on the compression fracture characteristics were also investigated.The results indicated that the porous SLM sample with α-martensite was very brittle,and the struts seriously fractured under uniaxial compressive stress.Densification behavior was not obvious in the SLM specimen due to the low-ductility strut.In contrast,the struts in the HIP specimen could be sufficiently deformed and rarely broke,resulting in apparent densification behavior.Moreover,the HIP specimen collapsed layer-by-layer from the periphery to the center of the lattice.These differences can be attributed to the microstructural change from brittle α-martensite to ductile α+β mixed phases after HIP treatment.
Additive manufacturing Selective laser melting Ti-6Al-4V Microstructure Fracture
Chiang Po-Hsing Wei Cheng-Yu Tsai Mo-Kai Chen Jhewn-Kuang Wu Ming-Wei
Department of Materials & Mineral Resources Engineering,National Taipei University of Technology,No.1,Sec.3,Zhong-Xiao E.Rd.,Taipei 10608,Chinese Taipei
国际会议
北京
英文
1623-1627
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）