材料工程2025，Vol.53Issue(6)：126-135,10.DOI:10.11868/j.issn.1001-4381.2024.000052
超声能场辅助激光熔化沉积TiC/Ti6Al4V复合材料的组织及性能
Microstructure and properties of TiC/Ti6Al4V composites by laser melting deposition assisted by ultrasonic energy field
摘要
Abstract
TiC/Ti6Al4V composites are prepared by synchronous ultrasonic energy field-assisted laser melting deposition.The effects of synchronous ultrasonic energy field treatment on the microstructure and properties of the composites with TiC volume fraction of 5%and 20%,respectively,are studied.The results show that the as-built composites contain inhomogeneous distributed undissolved TiC particles and in-situ TiC particles,among which 5%TiC/Ti6Al4V(volume fraction,the same below)composites contain chain shaped eutectic TiC with larger size,and 20%TiC/Ti6Al4V composites contain dendritic primary TiC with larger size.With the application of synchronous ultrasonic energy field treatment,the distribution uniformity of undissolved TiC particles in the composite is improved.Moreover,the in-situ TiC reinforcing phase is refined,where the chain shaped eutectic TiC transforms to granular eutectic TiC,and the size of dendritic primary TiC decreases.Due to the effect of synchronous ultrasonic energy field treatment,the microhardness of 5%TiC/Ti6Al4V and 20%TiC/Ti6Al4V increases from 406.5HV0.2 and 498.4HV0.2 to 414.2HV0.2 and 539.1HV0.2,respectively.The wear rates reduce from 1.82×10-6 mm3·m-1·N-1 and 1.04×10-6 mm3·m-1·N-1 to 1.78×10-6 mm3·m-1·N-1 and 9.48×10-7 mm3·m-1·N-1,respectively.The tensile strength of the 5%TiC/Ti6Al4V increases from 1075.23 MPa to 1116.31 MPa,the yield strength increases from 1021.51 MPa to 1043.12 MPa,and the fracture strain increases from 1.27%to 1.45%,which realizes the simultaneous improvement of strength and plasticity.关键词
激光熔化沉积/超声能场/TiC/Ti6Al4V复合材料/显微组织/性能Key words
laser melting deposition/ultrasonic energy field/TiC/Ti6Al4V composites/microstructure/property分类
矿业与冶金引用本文复制引用
王建东,赵子昂,曾禹周,薛宇,窦文浩,王大鹏,管瑶..超声能场辅助激光熔化沉积TiC/Ti6Al4V复合材料的组织及性能[J].材料工程,2025,53(6):126-135,10.基金项目
国家自然科学基金项目(52205343) （52205343）
航空科学基金项目(2022Z0550P6001) （2022Z0550P6001）
中央高校基本科研业务费(3072024JJ1004) （3072024JJ1004）
中国博士后科学基金面上资助项目(2019M651259) （2019M651259）
