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Title:
Grain Refinement and Aging Hardening of the Mg-10Gd-3Y-2Ag-0.4Zr Alloy Produced by a Two-Step Forming Process
Author: Ning HY; Yu YD; Gao B; Xiao LR; Wen LH; Yan ZH; Li L; Chen XF
Source: MATERIALS
Issued Date: 2018-05-01
Volume: 11, Issue:5
English Abstract: Grain refinement and precipitation are two effective ways to improve the mechanical properties of Mg-RE alloys. In this work, a two-step forming process is proposed. This includes cold rolling and subsequent annealing at high temperature for a short duration. By the two-step forming process, grains can be refined from 100 mu m to 20 mu m in compare with similar to 30 mu m by common hot rolling at 450 degrees C for a reduction of 80%. The sample shows more distinct aging hardening, as the hardness amplification of 60 HV is twice that of the hot-rolled sample. The precipitation is observed by high angle annular dark field-scanning transmission electron microscopy (HAADF-STEM). Dynamic precipitation in the sample by the two-step route is found to be effectively suppressed. Interestingly, after subsequent annealing, the density of precipitation, especially beta', become much higher than that in hot-rolled samples.
Keyword: Mg-Gd-Y-Ag-Zr alloy ; rolling ; thermal treatment ; microstructure ; mechanical property
Language: 英语
Indexed Type: SCI ; EI
DOI: 10.3390/ma11050757
DOC Type: Article
WOS Subject: Materials Science, Multidisciplinary
WOS Subject Extended: Materials Science
WOS Keyword Plus: Y-ZR ALLOY ; MECHANICAL-PROPERTIES ; MAGNESIUM ALLOYS ; HIGH-STRENGTH ; DYNAMIC PRECIPITATION ; MG-8.5GD-2.3Y-1.8AG-0.4ZR ALLOY ; DEFORMATION-BEHAVIOR ; HOT COMPRESSION ; AG ADDITION ; GD ALLOYS
WOS ID: WOS:000434711700107
ISSN: 1996-1944
Funder: National Natural Science Foundation of China(51601003) ; Natural Science Foundation of Heilongjiang Province of China(QC2017061) ; Harbin Science and Technology Bureau(2017RAQXJ066) ; Science Foundation for Young Scientists of Jiangsu, China(BK20140779)
Classification: 二类
Ranking: 1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/77512
Appears in Collections:非线性力学国家重点实验室_期刊论文

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Recommended Citation:
Ning HY,Yu YD,Gao B,et al. Grain Refinement and Aging Hardening of the Mg-10Gd-3Y-2Ag-0.4Zr Alloy Produced by a Two-Step Forming Process[J]. MATERIALS,2018-05-01,11(5).
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