Finite element modeling of microstructural changes in dry and cryogenic machining of AZ31B magnesium alloy

被引：56

作者：

Pu, Z. ^{[1
]}

Umbrello, D. ^{[1
,2
]}

Dillon, O. W., Jr. ^{[1
]}

Lu, T. ^{[1
]}

Puleo, D. A. ^{[3
]}

Jawahir, I. S. ^{[1
]}

机构：

[1] Univ Kentucky, Inst Sustainable Mfg, Lexington, KY 40506 USA

[2] Univ Calabria, Dept Mech Energy & Management Engn, I-87036 Arcavacata Di Rende, CS, Italy

[3] Univ Kentucky, Ctr Biomed Engn, Lexington, KY 40506 USA

来源：

JOURNAL OF MANUFACTURING PROCESSES | 2014年 / 16卷 / 02期

关键词：

Cryogenic machining; Finite element method (FEM); Dynamic recrystallization (DRX); Microstructrual changes; Mg alloy; SURFACE; PERFORMANCE; SIMULATION; TI-6AL-4V;

D O I：

10.1016/j.jmapro.2014.02.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Unsatisfactory corrosion resistance is one of the major disadvantages of magnesium alloys that impede their wide application. Microstructural changes, especially grain sizes, of Mg alloys have significant influence on their corrosion resistance. Cryogenic machining was reported to effectively induce grain refinement on Mg alloys and has a potential to improve their corrosion resistance. It is important to model these changes so that proper machining conditions can be found to enhance the corrosion rate of Mg alloys. In this paper, a preliminary study was conducted to model the microstructural changes of AZ31B Mg alloy during dry and cryogenic machining using the finite element (FE) method and a user subroutine based on the dynamic recrystallization (DRX) mechanism of Mg alloys. Good agreement in terms of grain size and affected layer thickness was found between experimental and predicted results. A numerical study was conducted using this model to investigate the influence of rake angle on microstructural changes after cryogenic machining. (C) 2014 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved.

引用

页码：335 / 343

页数：9

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