Effects of microstructures on mechanical properties of Ti-63 titanium alloy
来源期刊：Rare Metals2009年第6期
论文作者：YUE Qianga, LIU Yuqinb, WANG Dingchunc, WANG Xizhea, CHU Maoyoua, and SHEN Jianyuna a Mining, Metallurgy & Materials Research Department, General Research Institute for Nonferrous Metals, Beijing , China b School of Materials Science and Technology, China University of Geosciences, Beijing , China c Baoji Titanium Industry Co. Ltd., Baoji , China
文章页码：533 - 536
摘 要：The microstructure and mechanical properties of Ti-63 pancakes were investigated under different heat-treatment modes. Pancake No. 1, with an as-forged bimodal structure, was β annealed at 930°C for 1 h. Its structure was changed to a Widmanstatten structure with continuous grain boundary α phase and long lamellar α phase. The pancake showed a good combination of strength, ductility and fracture toughness. Pancake No. 2, with an as-forged bimodal structure, was aged at 540°C for 8 h after annealing at 930°C for 1 h. Other than the fine secondary α precipitates, it showed a similar microstructure to that of pancake No. 1. The fine precipitates can enhance the pancake’s strength while reducing the ductility and fracture toughness. Pancake No. 3, with an as-forged basket-weave structure, was annealed at 750°C for 1 h. Its structure was nearly unchanged and it achieved a better ductility but a slightly lower fracture toughness than pancake No. 1.
YUE Qianga, LIU Yuqinb, WANG Dingchunc, WANG Xizhea, CHU Maoyoua, and SHEN Jianyuna a Mining, Metallurgy & Materials Research Department, General Research Institute for Nonferrous Metals, Beijing 100088, China b School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China c Baoji Titanium Industry Co. Ltd., Baoji 721014, China
摘 要：The microstructure and mechanical properties of Ti-63 pancakes were investigated under different heat-treatment modes. Pancake No. 1, with an as-forged bimodal structure, was β annealed at 930°C for 1 h. Its structure was changed to a Widmanstatten structure with continuous grain boundary α phase and long lamellar α phase. The pancake showed a good combination of strength, ductility and fracture toughness. Pancake No. 2, with an as-forged bimodal structure, was aged at 540°C for 8 h after annealing at 930°C for 1 h. Other than the fine secondary α precipitates, it showed a similar microstructure to that of pancake No. 1. The fine precipitates can enhance the pancake’s strength while reducing the ductility and fracture toughness. Pancake No. 3, with an as-forged basket-weave structure, was annealed at 750°C for 1 h. Its structure was nearly unchanged and it achieved a better ductility but a slightly lower fracture toughness than pancake No. 1.
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