Mechanical and functional properties of Fe-Mn-Si biodegradable alloys fabricated by laser powder bed fusion: Effect of heat treatment

被引:6
作者
Nie, Yong [1 ,2 ]
Yuan, Bo [3 ,4 ]
Liang, Jiawei [5 ]
Deng, Tao [5 ]
Li, Xiaofan [6 ]
Chen, Peng [6 ]
Zhang, Kai [3 ,4 ]
Li, Xiangyun [7 ]
Li, Kang [7 ,8 ,9 ]
Peng, Huabei [5 ]
Gong, Shan [10 ]
机构
[1] Sichuan Univ, West China Hosp, Dept Orthoped Surg, Chengdu 610041, Peoples R China
[2] Sichuan Univ, West China Hosp, Orthoped Res Inst, Chengdu 610041, Peoples R China
[3] Sichuan Univ, Natl Engn Res Ctr Biomat, Chengdu 610064, Peoples R China
[4] Sichuan Univ, Coll Biomed Engn, Chengdu 610064, Peoples R China
[5] Sichuan Univ, Sch Mech Engn, Chengdu 610065, Peoples R China
[6] Southwest Jiaotong Univ, Sch Mech Engn, Chengdu 610031, Peoples R China
[7] Sichuan Univ, West China Hosp, West China Biomed Big Data Ctr, Chengdu 610041, Peoples R China
[8] Sichuan Univ, Med X Ctr Informat, Chengdu 610041, Peoples R China
[9] Shanghai Artificial Intelligence Lab, Shanghai 200232, Peoples R China
[10] Sichuan Univ, Sichuan Univ Pittsburgh Inst, Chengdu 610207, Peoples R China
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2024年 / 908卷
关键词
Laser powder bed fusion; Fe-Mn-Si alloy; Microstructure; Mechanical property; Biocompatibility; SHAPE-MEMORY ALLOY; IN-VITRO; CORROSION BEHAVIOR; MAGNESIUM ALLOYS; DEFORMATION; DESIGN; RECRYSTALLIZATION; MICROSTRUCTURE; PROGRESS; GROWTH;
D O I
10.1016/j.msea.2024.146725
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
This study examines the microstructure evolution as well as the mechanical and functional properties of Fe-Mn-Si alloys produced by LPBF and subsequent heat treatment. The as-printed microstructure is dominant by gamma austenitic phase where finer equiaxed grains are found in the printing plane with a preference of <102> orientation alignment with building direction. The segregation of Mn and Si at cell boundaries results in the precipitation of D0(3) (Fe3Si) phase. With increasing annealing temperature below 800 degrees C, the quantities of both epsilon martensite (having the orientation relationship of (111)gamma// (0002)epsilon and [011]gamma// [2 (11) over bar0]epsilon) and D0(3) precipitates (having the orientation relationship with the gamma austenite as ((11) over bar1)(gamma)// (20 (2) over bar )D03 and [011](gamma)// [111]D03) increase. Full recrystallization at higher temperature (900 degrees C) would eradicate as-printed microstructure characteristics and stimulate abundant annealing twins inside the austenite grains. The as-printed Fe-Mn-Si alloys exhibit anisotropic tensile behavior with superior values in the case of building direction parallel to the tensile direction, which is reduced with increasing annealing temperature and minimized by complete recrystallization at 900 degrees C. The shape recovery ratio rises to a maximum value at 650 degrees C but decreases with the onset of recrystallization at higher temperature due to the reduction of SFs. The co-culture test demonstrates the outstanding in vitro compatibility of the printed Fe-Mn-Si alloy, which may enhance osteoblasts' growth and promote the regeneration of bone tissue. The remarkable ability of Fe-Mn-Si alloys to form complex structures through LPBF, together with its outstanding overall mechanical properties and biocompatibility, provides a solid foundation for the advancement of biodegradable implant designs.
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页数:14
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