Laser & Optoelectronics Progress, Volume. 56, Issue 24, 241401(2019)
Structure and Properties of 316L Stainless Steel Lattice Reinforced via Selective Laser Melting Using Vanadium Carbide Particles
Herein, V8C7 nanoparticles were mixed with 316L stainless steel powder via ball-milling for selective laser melting (SLM)-assisted three-dimensional (3D) printing. Then, a lattice structural V8C7/316L composite was printed via SLM. Using optimized SLM process parameters, the density of composite solid parts as high as 99.4% was achieved. In addition, during the laser melting-solidification process, VCx reinforcements were generated via the decomposition-precipitation mechanism of V8C7 as the nanoscale nucleation sites. Consequently, the dispersed VCx nanoparticles were preferentially distributed along the austenite grain boundaries, thereby further inhibiting the grain-coarsening of austenite during rapid solidification. The nano-VCx reinforcements and the ultrafine metal-matrix grains that were nearly equiaxed, contributed to a significant increase in the specific strength of V8C7/316L lattice structures.
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Wangqi Fu, Bo Qian, Zhiyuan Liu, Bo Li. Structure and Properties of 316L Stainless Steel Lattice Reinforced via Selective Laser Melting Using Vanadium Carbide Particles[J]. Laser & Optoelectronics Progress, 2019, 56(24): 241401
Category: Lasers and Laser Optics
Received: Apr. 29, 2019
Accepted: Jun. 6, 2019
Published Online: Nov. 26, 2019
The Author Email: Qian Bo (qianbo@ecust.edu.cn)