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石磊,雷力明,付鑫,杨阳,付俊.Fe含量对激光立体成形TC4合金组织性能的影响[J].稀有金属材料与工程(英文),2020,49(5):1674~1680.[Shi Lei,Lei Liming,Fu Xin,Yang Yang and Fu Jun).Effect of Fe content on the microstructure and tensile properties of TC4 alloy fabricated by laser solid forming[J].Rare Metal Materials and Engineering,2020,49(5):1674~1680.]
Effect of Fe content on the microstructure and tensile properties of TC4 alloy fabricated by laser solid forming
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Received:April 10, 2019  Revised:July 13, 2019
DOI:
Key words: Laser solid forming  TC4  Fe content  tensile properties
Foundation item:国家重点研发计划(2017YFB1103803, 2017YFB1103004)
Author NameAffiliation
Shi Lei,Lei Liming,Fu Xin,Yang Yang and Fu Jun)  
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Abstract:
      The effect of Fe content on the microstructure and tensile properties of TC4 alloy manufactured by laser solid forming was investigated. The analysis of microstructure evolution of samples during heat treatment process showed that Fe didn’t affect the microstructure of as-built samples, consisting of coarse columnar β grains in the longitudinal section, while after heat treatments the coarse columnar β grains in the longitudinal section were translated into fine columnar β grains with increasing Fe content from 0.026%wt. to 0.18%wt, suggesting the occurrence of recrystallization. The tensile strength of samples at room temperature after heat treatments was higher than the standard requirements for forging. The tensile strength parallel to building direction was improved with the increasing of Fe, as for the strength perpendicular to building direction was insensitive to Fe content.