四川大学学报（自然科学版）2025，Vol.62Issue(4)：785-792,8.DOI:10.19907/j.0490-6756.250037
激光熔丝增材制造TC11钛合金微观组织及力学性能研究
Microstructure and mechanical properties of TC11 titanium alloy obtained by laser wire additive manufacturing
摘要
Abstract
This paper investigates the microstructure and mechanical properties of TC11 titanium alloy(Ti-6.5Al-3.5Mo-1.5Zr-0.3Si)fabricated by laser wire additive manufacturing.The results reveal that the as-deposited TC11 titanium alloy contains 300～500 μm inclined columnar crystals with distinct layer banding phenomenon.The grain interior exhibit a basketweave structure primaryly composed of acicular α phase,α cluster and β-transformed structure.The as-deposited sample demonstrates an average hardness of 348.98 HV,with room temperature tensile strength significantly exceeding standard requirements.The sample shows average yield strength of 1415 MPa,average tensile strength of 1527 MPa,elongation of 6.95%,and t quasi-cleavage fracture characteristics.The average KQ of fracture toughness is 65.95 MPa·m1/2.The fracture toughness specimens exhibit tortuous crack paths with micropore formation during propagation,and secondary cracks are formed by micropore connection.In the process of crack propagation,the α cluster aligned along the crack direction can hinder the crack propagation to a certain extent.关键词
激光熔丝增材制造/TC11钛合金/显微组织/力学性能Key words
Laser wire additive manufacturing/TC11 titanium alloy/Microstructure/Mechanical properties分类
信息技术与安全科学引用本文复制引用
张鑫,张振林,陈勇,刘艳,杨熊,周飞,荣鹏,陈辉..激光熔丝增材制造TC11钛合金微观组织及力学性能研究[J].四川大学学报（自然科学版）,2025,62(4):785-792,8.基金项目
国家重点研发计划(2022YFB4602300) （2022YFB4602300）
四川省重大科技专项(2023ZDZX0003) （2023ZDZX0003）
