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Title:
A new method for grain refinement in magnesium alloy: High speed extrusion machining
Author: Liu Y; Cai SongLin(蔡松林); Dai LH(戴兰宏)
Source: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Issued Date: 2016-01-10
Volume: 651, Pages:878-885
Abstract: Magnesium alloys have received broad attentions in industry due to their competitive strength to density ratio, but the poor ductility and strength limit their wide range of applications as engineering materials. A novel severe plastic deformation (SPD) technique of high speed extrusion machining (HSEM) was used here. This method could improve the aforementioned disadvantages of magnesium alloys by one single processing step. In this work, systematic HSEM experiments with different chip thickness ratios were conducted for magnesium alloy AZ31B. The microstructure of the chips reveals that HSEM is an effective SPD method for attaining magnesium alloys with different grain sizes and textures. The magnesium alloy with bimodal grain size distribution has increased mechanical properties than initial sample. The electron backscatter diffraction (EBSD) analysis shows that the dynamic recrystallization (DRX) affects the grain refinement and resulting hardness in AZ31B. Based on the experimental observations, a new theoretical model is put forward to describe the effect of DRX on materials during HSEM. Compared with the experimental measurements, the theoretical model is effective to predict the mechanical property of materials after HSEM. (c) 2015 Elsevier B.V. All rights reserved.
Keyword: High speed extrusion machining ; Magnesium alloy ; Grain refinement ; Dynamic recrystallization
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Liu, Y (reprint author), Univ Sci & Technol Beijing, Sch Math & Phys, Beijing 100083, Peoples R China.
Correspondent Email: liuyao@ustb.edu.cn
DOI: 10.1016/j.msea.2015.11.046
Related URLs: 查看原文
DOC Type: 期刊论文
WOS Subject: Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS Subject Extended: Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS Keyword Plus: SEVERE PLASTIC-DEFORMATION ; BULK NANOSTRUCTURED MATERIALS ; HIGH-PRESSURE TORSION ; AZ31 MG ALLOY ; MECHANICAL-PROPERTIES ; ELEVATED-TEMPERATURES ; STRAIN ; MICROSTRUCTURE ; EVOLUTION ; METALS
WOS ID: WOS:000367486800100
ISSN: 0921-5093
Funder: This work has been supported by the National Natural Science Foundation of China (Grant no. 11132011), Fundamental Research Funds for the Central Universities (Grant no. FRF-TP-15-101A1), the National Basic Research Program of China (Grant no. 2012CB937500), and the CAS/SAFEA International Partnership Program for Creative Research Teams.
Rank: [Liu, Yao] Univ Sci & Technol Beijing, Sch Math & Phys, Beijing 100083, Peoples R China; [Cai, Songlin] State Grid Corp China, China Elect Power Res Inst, Beijing 100192, Peoples R China; [Dai, Lanhong] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
Department: LNM冲击动力学与新型材料力学性能
Classification: 一类
First Institution (Yes or Not): False
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/58645
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:
Liu Y,Cai SL,Dai LH. A new method for grain refinement in magnesium alloy: High speed extrusion machining[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2016-01-10,651:878-885.
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