The effect of microstructure on the fatigue behavior of titanium alloy graded porous structures fabricated by selective laser melting

• DOI: 10.1016/j.jmrt.2023.10.281
• Publication Date: 2023-11-04T17:24:08Z
• Authors: Jian Chen; Men Fan; Libo Zhou; Wei Chen; Yanjie Ren; Wei Li; Weiying Huang; Yan Niu; Zhou Li; Cong Li
• Keywords: Selective Laser Melting; Fatigue limit; Titanium alloy

The bionic-inspired Ti–15Mo gradient porous structures were fabricated by selective laser melting (SLM) for the first time in this work. compression-compression fatigue behavior of functional is investigated, with emphasis on understanding relationship between performance and microstructure. microstructure samples was analyzed both before after fatigue, correlated performance. During cyclic deformation, pillars exhibited a non-uniform local stress distribution, primarily attributed to disparity density distribution. Fatigue cracks typically initiate at place defects subsequently propagate until structural damage occurs. ratcheting effect occurs throughout entire process while initiates later stage process. results indicated that lateral (LG) structure superior homogeneous structure, vertical (VG) poorest