Study on Microstructure and Mechanical Properties of High Temperature Titanium Alloy Formed by Selective Laser Melting AITranslate
Abstract AITranslate
Selective laser melting(SLM)was used as the forming process of high temperature titanium alloy,and the influence of heat treatment temperature on the microstructure and mechanical properties of the SLM-formed high temperature titanium alloy was studied.The experimental results show that with the increase of input laser energy,the defects inside the formed alloy change from irregular unfused defects to regular spherical hole defects.The optimal forming process parameters include laser power of 190 W,scanning speed of 560 mm/s,powder layer thickness of 0.03 mm,and scanning spacing of 0.06 mm.When the heat treatment temperature is lower than the phase transformation temperature,the alloy exhibits basketweave microstructure composed of lathαandβresidual microstructure.In addition,the content of the lathαin the alloy microstructure decreases with the increase of temperature,its length-width ratio decreases,and part of the lath a gradually spheroidizes.When the heat treatment temperature is higher than the phase transformation temperature,the basketweave microstructure in the alloy is transformed into Widmanstatten microstructure.With the increase of heat treatment temperature,the tensile strength of the alloy is basically unchanged,the yield strength is increased,and the plasticity shows a trend of decreasing at first and then increasing.The best strength-plasticity matching of the alloy is achieved under the heat treatment conditions of 995℃×2 h/AC:the tensile strength is 972 MPa,the yield strength is 774.5 MPa,and the elongation is 16%.
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Basic Information:
DOI：
Chinese Library Classification Number:TG146.23[金属学及工艺—金属材料]
Citation Information:
Selective laser melting(SLM)was used as the forming process of high temperature titanium alloy,and the influence of heat treatment temperature on the microstructure and mechanical properties of the SLM-formed high temperature titanium alloy was studied.The experimental results show that with the increase of input laser energy,the defects inside the formed alloy change from irregular unfused defects to regular spherical hole defects.The optimal forming process parameters include laser power of 190 W,scanning speed of 560 mm/s,powder layer thickness of 0.03 mm,and scanning spacing of 0.06 mm.When the heat treatment temperature is lower than the phase transformation temperature,the alloy exhibits basketweave microstructure composed of lathαandβresidual microstructure.In addition,the content of the lathαin the alloy microstructure decreases with the increase of temperature,its length-width ratio decreases,and part of the lath a gradually spheroidizes.When the heat treatment temperature is higher than the phase transformation temperature,the basketweave microstructure in the alloy is transformed into Widmanstatten microstructure.With the increase of heat treatment temperature,the tensile strength of the alloy is basically unchanged,the yield strength is increased,and the plasticity shows a trend of decreasing at first and then increasing.The best strength-plasticity matching of the alloy is achieved under the heat treatment conditions of 995℃×2 h/AC:the tensile strength is 972 MPa,the yield strength is 774.5 MPa,and the elongation is 16%.
quote
| GB/T 7714-2015 | [1] LIU Yi, CAI Yu-sheng, JIANG Mu-chi, et al. Study on Microstructure and Mechanical Properties of High Temperature Titanium Alloy Formed by Selective Laser Melting[J]. Rare Metals and Cemented Carbides, 2023(2): 78-84. |
| MLA | [1] LIU Yi, et al., "Study on Microstructure and Mechanical Properties of High Temperature Titanium Alloy Formed by Selective Laser Melting." Rare Metals and Cemented Carbides, no. 2, 2023, pp. 78-84. |
| APA | [1] LIU Yi, CAI Yu-sheng, JIANG Mu-chi, REN De-chun, JI Hai-bin, LEI Jia-feng, & XIAO Xuan. (2023). Study on Microstructure and Mechanical Properties of High Temperature Titanium Alloy Formed by Selective Laser Melting. Rare Metals and Cemented Carbides(2), 78-84. |
| IEEE | [1] LIU Yi, CAI Yu-sheng, JIANG Mu-chi, REN De-chun, JI Hai-bin, LEI Jia-feng, and XIAO Xuan, "Study on Microstructure and Mechanical Properties of High Temperature Titanium Alloy Formed by Selective Laser Melting," Rare Metals and Cemented Carbides, no. 2, pp. 78-84, 2023. keywords: {selective laser melting;high temperature titanium alloy;forming;heat treatment;microstructure;defect;mechanical property} |