Effect of deposition rate on microstructure and mechanical properties of wire arc additive manufacturing of Ti-6Al-4V components

• Published in: Journal of Central South University Vol. 28; no. 4; pp. 1100 - 1110
• Main Authors: Zhang, Pei-lei, Jia, Zhi-yuan, Yan, Hua, Yu, Zhi-shui, Wu, Di, Shi, Hai-chuan, Wang, Fu-xin, Tian, Ying-tao, Ma, Song-yun, Lei, Wei-sheng
• Format: Journal Article
• Language: English
• Published: Changsha Central South University 01.04.2021; Springer Nature B.V
• Subjects: Additive manufacturing; Arc deposition; Arc heating; Engineering; Mechanical properties; Metallic Materials; Microhardness; Microstructure; Morphology; Titanium base alloys; Ultimate tensile strength; Wire; 冷金属过渡; wire and arc additive manufacturing; titanium alloys; deposition rate; 钛合金; cold metal transfer; 丝材电弧增材制造; 沉积速率
• ISSN: 2095-2899; 2227-5223
• DOI: 10.1007/s11771-021-4683-0

Wire arc additive manufacturing (WAAM) is a novel manufacturing technique by which high strength metal components can be fabricated layer by layer using an electric arc as the heat source and metal wire as feedstock, and offers the potential to produce large dimensional structures at much higher build rate and minimum waste of raw material. In the present work, a cold metal transfer (CMT) based additive manufacturing was carried out and the effect of deposition rate on the microstructure and mechanical properties of WAAM Ti-6Al-4V components was investigated. The microstructure of WAAM components showed similar microstructural morphology in all deposition conditions. When the deposition rate increased from 1.63 to 2.23 kg/h, the ultimate tensile strength (UTS) decreased from 984.6 MPa to 899.2 MPa and the micro-hardness showed a scattered but clear decline trend.