Effect of Heat Treatment on Microstructure and Properties of Laser Deposition Repair TA15 Titanium Alloy
TA15 alloy was repaired by laser deposited repair with various heat treatments,and microstructure and tensile properties and fracture morphology were investigated.Results indicate that annealed state has coarse primitive columnar β with small lamellar basket weave structure.The comprehensive tensile performance of the annealed state specimen is good and meet the mechanical performance standards for annealed aviation forging.After solid solution-aging treatment,martensitic transformation occurs in β phase,the primary α phase and hexagonal martensite α'are obtained.The tensile properties of repair specimen after solid solution-aging are obviously improved.
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