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EFFECTS OF HIGH TEMPERATURE SHORT TIME AGEING TREATMENT ON THE MICROSTRUCTURES AND MECHANICAL PROPERTIES OF Mg-3Nd-1Zn ALLOY
Wang Wenhui1,2; Wu Di1; Chen Rongshi1; Lou Changsheng2
Corresponding AuthorWu Di(dwu@imr.ac.cn)
2016-05-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume52Issue:5Pages:567-574
AbstractAmong the traditional cast magnesium alloys system, Mg-3Nd-1Zn alloy with high strength and heat resistance, has been widely applied in aeronautics such as in engine box and wing rib of airplane. In present research, the as-cast Mg-2.7Nd-0.6Zn-0.5Zr (NZ31) alloy was solution treated and then aged at temperatures ranging from 200 degrees C to 300 degrees C. The microstructures and mechanical properties of the aged specimens especially at relatively high temperature (225 similar to 300 degrees C) were systematically characterized by OM, SEM and TEM. A new kind of precipitates distributed in line was clearly found in the specimens aged at high temperature (225 similar to 275 degrees C) for a short time (15 similar to 30 min), which corresponded to a significant enhancement of hardness and tensile strength at room temperature. The TEM results showed that the precipitates distributed in line had a composition of Mg12Nd and a granular shape, and mainly formed along the (0001)(Mg) basal plane. The special distribution of the granular Mg12Nd precipitates was effective barriers to the basal slips and may probably restrain the intergranular coordination during tensile deformation, leading to a large strengthening effect, that is, the yield strength and ultimate tensile strength, of the NZ31 alloy aged at 250 similar to 275 degrees C for 20 similar to 30 min, increased by about 70% and 29% respectively, in comparison with only the solutionized one.
Keywordmagnesium alloy ageing treatment precipitate mechanical property
DOI10.11900/0412.1961.2015.00333
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000376471100007
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/122251
Collection中国科学院金属研究所
Corresponding AuthorWu Di
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Shenyang Ligong Univ, Sch Mat Sci & Engn, Shenyang 110159, Peoples R China
Recommended Citation
GB/T 7714
Wang Wenhui,Wu Di,Chen Rongshi,et al. EFFECTS OF HIGH TEMPERATURE SHORT TIME AGEING TREATMENT ON THE MICROSTRUCTURES AND MECHANICAL PROPERTIES OF Mg-3Nd-1Zn ALLOY[J]. ACTA METALLURGICA SINICA,2016,52(5):567-574.
APA Wang Wenhui,Wu Di,Chen Rongshi,&Lou Changsheng.(2016).EFFECTS OF HIGH TEMPERATURE SHORT TIME AGEING TREATMENT ON THE MICROSTRUCTURES AND MECHANICAL PROPERTIES OF Mg-3Nd-1Zn ALLOY.ACTA METALLURGICA SINICA,52(5),567-574.
MLA Wang Wenhui,et al."EFFECTS OF HIGH TEMPERATURE SHORT TIME AGEING TREATMENT ON THE MICROSTRUCTURES AND MECHANICAL PROPERTIES OF Mg-3Nd-1Zn ALLOY".ACTA METALLURGICA SINICA 52.5(2016):567-574.
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