Selective Laser Melting of In-situ TiB2 Reinforced AlSi10Mg Composite and Its High Temperature Properties
Author of the article:XIA Cunjuan;LIAN Qing;CHEN Yingyan;WANG Haowei
Author's Workplace：School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China
Key Words：selective laser melting(SLM) TiB2 Aluminum matrix composite AlSi10Mg high temperature properties
Abstract：
The in-situ TiB2-AlSi10 Mg composite was prepared by laser selective melting(SLM),and the effect of TiB2 particles on the microstructure and mechanical properties at high temperature was investigated.The results show that TiB2 particles are uniformly distributed in the matrix and Si is distributed in a fine gridded manner.The grains are mostly fine equiaxed grains with no obvious preferred orientation,and the average grain size is 1.4μm.At 350℃,the real tensile strength of SLM formed TiB2-AlSi10 Mg composite was 123.0 MPa,and the elongation after fracture is 28.0%.The deformation mechanism is mainly grain boundary sliding accompanied by a small amount of dislocation sliding and climbing.
