Effect of microstructure evolution on tensile fracture behavior of Mg-2Zn-1Nd-0.6Zr alloy for biomedical applications

被引:31
作者
Cai, Changhong [1 ]
Song, Renbo [1 ]
Wen, Erding [1 ]
Wang, Yongjin [1 ]
Li, Jingyuan [1 ]
机构
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
关键词
Mg alloy; Biomedical; Microstructure evolution; Pre-immersion; Tensile fracture; STRESS-CORROSION CRACKING; MICRO-GALVANIC CORROSION; CAST MG-ZN; MECHANICAL-PROPERTIES; MAGNESIUM ALLOYS; ND; MN; TEXTURE; SURFACE; PHASE;
D O I
10.1016/j.matdes.2019.108038
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The effect of microstructure evolution on tensile fracture behavior of biomedical Mg-2Zn-1Nd-0.6Zr alloy was investigated using OM, EPMA, SEM, TEM, EBSD and Nano-indentation. Results indicated that the as-cast Mg-2Zn-1Nd-0.6Zr alloy composed of alpha-Mg matrix, netlike and granular Mg35Zn40Nd25 (T-3) secondary phases. Volume fraction of secondary phases in homogenized and solution-treated alloys decreased from 72% to 4.6% and 0%, respectively, whilst elements distributed more uniform and grain did not grow significantly. Grain size of extruded + aged alloy decreased from 110 mu m to 12 mu m, forming band-shaped phases with size of 02-1.5 mu m and high-density nanoscale precipitates with size of 5-20 nm. Moreover, Mg35Zn40Nd25 phase exhibited higher elastic modulus ( 57.5 GPa) and hardness (1.47 GPa) than all matrices. With the change of phase content, phase morphology and grain size, the fracture mode of as-cast, homogenized, solution-treated and extruded + aged alloys during the conventional tensile test changed from intergranular fracture to quasi-cleavage fracture, transgranular fracture and ductile fracture. In addition, the effect of reduced surface integrity on cracking susceptibility could be ranked in the order of as-cast > homogenized > solution-treated > extruded + aged. (C) 2019 The Authors. Published by Elsevier Ltd.
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页数:11
相关论文
共 58 条
[1]  
A. NACE, 2012, ASTMG3112A A NACE
[2]   Effect of anodic T phase on surface micro-galvanic corrosion of biodegradable Mg-Zn-Zr-Nd alloys [J].
Cai, Changhong ;
Song, Renbo ;
Wang, Luanxiang ;
Li, Jingyuan .
APPLIED SURFACE SCIENCE, 2018, 462 :243-254
[3]   Surface corrosion behavior and reaction product film deposition mechanism of Mg-Zn-Zr-Nd alloys during degradation process in Hank's solution [J].
Cai, Changhong ;
Song, Renbo ;
Wang, Luanxiang ;
Li, Jingyuan .
SURFACE & COATINGS TECHNOLOGY, 2018, 342 :57-68
[4]   Weak strengthening effect of the precipitated lamellar phase in the homogenized Mg-8Gd-4Y-1.6Zn-0.5Zr (wt%) alloy followed by furnace cooling [J].
Chen, D. J. ;
Zhang, K. ;
Li, T. ;
Li, X. G. ;
Li, Y. J. ;
Ma, M. L. ;
Shi, G. L. ;
Yuan, J. W. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2019, 744 :1-9
[5]   Effect of minor content of Gd on the mechanical and degradable properties of as-cast Mg-2Zn-xGd-0.5Zr alloys [J].
Chen, Junxiu ;
Tan, Lili ;
Yu, Xiaoming ;
Yang, Ke .
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2019, 35 (04) :503-511
[6]   Microstructure evolution and mechanical performance improvement of thin ZK61 magnesium alloy sheets subjected to cumulative cold rolling and intermediate annealing [J].
Chen, W. Z. ;
Ma, L. M. ;
Chen, X. M. ;
Cui, G. R. ;
Zhang, W. C. ;
Wang, E. D. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2018, 733 :350-360
[7]   Recent advances on the development of magnesium alloys for biodegradable implants [J].
Chen, Yongjun ;
Xu, Zhigang ;
Smith, Christopher ;
Sankar, Jag .
ACTA BIOMATERIALIA, 2014, 10 (11) :4561-4573
[8]   Microstructure and mechanical properties of as-cast Mg-Sn-Zn-Y alloys [J].
Chen, Yu'an ;
Wang, Yi ;
Gao, Junjie .
JOURNAL OF ALLOYS AND COMPOUNDS, 2018, 740 :727-734
[9]   Preparation of Mg-Nd-Zn-(Zr) alloys semisolid slurry by electromagnetic stirring [J].
Chen, Yushi ;
Zhang, Liang ;
Liu, Wencai ;
Wu, Guohua ;
Ding, Wenjiang .
MATERIALS & DESIGN, 2016, 95 :398-409
[10]   Effect of Mn addition on grain refinement of biodegradable Mg-4Zn-0.5Ca alloy [J].
Cho, Dae Hyun ;
Nam, Ji Hoon ;
Lee, Byoung Woo ;
Cho, Kyung Mox ;
Park, Ik Min .
JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 676 :461-468