Institutional Repository of Coll Mat Sci & Engn
Development of a new magnesium alloy ZW21 | |
Chen, T. J.; Wang, W.; Zhang, D. H.; Ma, Y.; Hao, Y. | |
2013-02 | |
发表期刊 | MATERIALS & DESIGN |
ISSN | 0264-1275 |
卷号 | 44页码:555-565 |
摘要 | A new magnesium alloy named ZW21 has been developed through orthogonal experiment method and the effects of heat treatment on the alloy's tensile properties have also been investigated. The results indicate that the alloy only has one Mg-Zn-Y(Nd) phase of Mg3Zn3(Y, Nd)(2) (named W phase) and has higher mechanical properties, lower cost and lighter weight compared with the other congeneric alloys. Its microstructure is composed of small equiaxed dendrites and interdendritic discontinuous net-like eutectic structures. The eutectic structures appear in divorced W phase laths in the thin regions between the dendrites and in regular W + alpha-Mg lamellar structures in the triangle regions. The eutectic structures, especially the W phase, with such distribution are harmful to the tensile properties and thus proper heat treatment can improve its properties through changing the W phase distribution. Solution treatment at 525 degrees C for 4 h (T-4 treatment) increases the elongation from 17.75% to 26.5%. Subsequent ageing treatment at 250 degrees C for 24 h (T-6 treatment) improves the ultimate tensile strength from 210 MPa to 243 MPa. The fracture modes of the as-cast, T-4- and T-6-treated alloys all obey the quasi-cleavage regime. The fracture of the as-cast alloy belongs to a mixed mode of intergranular and transgranular forms, but those of the T-4- and T-6-treated alloys follow the transgranular mode due to the relatively high bonding strength between the grains. (C) 2012 Elsevier Ltd. All rights reserved. |
关键词 | Non-ferrous metals and alloys Mechanical Microstructure |
DOI | 10.1016/j.matdes.2012.08.040 |
收录类别 | SCI ; SCIE |
语种 | 英语 |
资助项目 | National Basic Research Program of China[G2010CB635106] ; Program for New Century Excellent Talents in University of China[NCET-10-0023] |
WOS研究方向 | Materials Science |
WOS类目 | Materials Science, Multidisciplinary |
WOS记录号 | WOS:000310572200068 |
出版者 | ELSEVIER SCI LTD |
EI入藏号 | 20132516440098 |
EI主题词 | Magnesium alloys |
EI分类号 | 408 Structural Design - 531.2 Metallography - 537.1 Heat Treatment Processes - 542.2 Magnesium and Alloys - 801.4 Physical Chemistry - 951 Materials Science |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/34749 |
专题 | 材料科学与工程学院 |
通讯作者 | Chen, T. J. |
作者单位 | Lanzhou Univ Technol, Key Lab Gansu Adv Nonferrous Met Mat, Lanzhou 730050, Peoples R China |
第一作者单位 | 材料科学与工程学院 |
通讯作者单位 | 材料科学与工程学院 |
第一作者的第一单位 | 材料科学与工程学院 |
推荐引用方式 GB/T 7714 | Chen, T. J.,Wang, W.,Zhang, D. H.,et al. Development of a new magnesium alloy ZW21[J]. MATERIALS & DESIGN,2013,44:555-565. |
APA | Chen, T. J.,Wang, W.,Zhang, D. H.,Ma, Y.,&Hao, Y..(2013).Development of a new magnesium alloy ZW21.MATERIALS & DESIGN,44,555-565. |
MLA | Chen, T. J.,et al."Development of a new magnesium alloy ZW21".MATERIALS & DESIGN 44(2013):555-565. |
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