Effect of heat treatment on the microstructure and mechanical properties of the consolidated Mg alloy AZ91D machined chips

Horng Yu Wu; Chang Chuan Hsu; Jen Bin Won; Pin Hou Sun; Jian Yih Wang; Shyong Lee; Chui Hung Chiu; Shan Torng

doi:10.1016/j.jmatprotec.2008.11.001

Effect of heat treatment on the microstructure and mechanical properties of the consolidated Mg alloy AZ91D machined chips

Horng Yu Wu, Chang Chuan Hsu, Jen Bin Won, Pin Hou Sun, Jian Yih Wang, Shyong Lee, Chui Hung Chiu, Shan Torng

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

Influence of heat treatment on the properties of the consolidated AZ91D Mg alloy chips was performed in this study. The chips were pressed into a die to form a compact with a green density of 1.6 g/cm³. The 50-mm diameter green compact was then extruded into a 20-mm rod at 350 °C. The extruded rod was solution treated at a temperature of 415 °C for 24 h; the solution treated specimens were then aged at two temperatures: 170 and 215 °C. Heat treatments were conducted to explore the microstructure evolution and mechanical properties of the extruded rod. Heat treatments revealed that the age hardening effect was related to the transformation of the microstructure. Over aging during age heat treatment was believed to be caused by the formation of a lamellar structure composed of alternating layers of Mg₁₇Al₁₂ phase and magnesium matrix.

Original language	English
Pages (from-to)	4194-4200
Number of pages	7
Journal	Journal of Materials Processing Technology
Volume	209
Issue number	8
DOIs	https://doi.org/10.1016/j.jmatprotec.2008.11.001
State	Published - 21 Apr 2009

Keywords

AZ91D Mg alloy
Age hardening
Lamellar structure
Solid-state recycling

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10.1016/j.jmatprotec.2008.11.001

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title = "Effect of heat treatment on the microstructure and mechanical properties of the consolidated Mg alloy AZ91D machined chips",

abstract = "Influence of heat treatment on the properties of the consolidated AZ91D Mg alloy chips was performed in this study. The chips were pressed into a die to form a compact with a green density of 1.6 g/cm3. The 50-mm diameter green compact was then extruded into a 20-mm rod at 350 °C. The extruded rod was solution treated at a temperature of 415 °C for 24 h; the solution treated specimens were then aged at two temperatures: 170 and 215 °C. Heat treatments were conducted to explore the microstructure evolution and mechanical properties of the extruded rod. Heat treatments revealed that the age hardening effect was related to the transformation of the microstructure. Over aging during age heat treatment was believed to be caused by the formation of a lamellar structure composed of alternating layers of Mg17Al12 phase and magnesium matrix.",

keywords = "AZ91D Mg alloy, Age hardening, Lamellar structure, Solid-state recycling",

author = "Wu, {Horng Yu} and Hsu, {Chang Chuan} and Won, {Jen Bin} and Sun, {Pin Hou} and Wang, {Jian Yih} and Shyong Lee and Chiu, {Chui Hung} and Shan Torng",

note = "Funding Information: This work was conducted through grants from National Science Council under the contract no. NSC 95-2212-E-216-009, Chung-hua University under the contract no. CHU NSC 95-2212-E-216-009, and Ministry of Economic Affairs under the contract no. 97-EC-17-A-08-R7-0706.",

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T1 - Effect of heat treatment on the microstructure and mechanical properties of the consolidated Mg alloy AZ91D machined chips

AU - Wu, Horng Yu

AU - Hsu, Chang Chuan

AU - Won, Jen Bin

AU - Sun, Pin Hou

AU - Wang, Jian Yih

AU - Lee, Shyong

AU - Chiu, Chui Hung

AU - Torng, Shan

N1 - Funding Information: This work was conducted through grants from National Science Council under the contract no. NSC 95-2212-E-216-009, Chung-hua University under the contract no. CHU NSC 95-2212-E-216-009, and Ministry of Economic Affairs under the contract no. 97-EC-17-A-08-R7-0706.

PY - 2009/4/21

Y1 - 2009/4/21

N2 - Influence of heat treatment on the properties of the consolidated AZ91D Mg alloy chips was performed in this study. The chips were pressed into a die to form a compact with a green density of 1.6 g/cm3. The 50-mm diameter green compact was then extruded into a 20-mm rod at 350 °C. The extruded rod was solution treated at a temperature of 415 °C for 24 h; the solution treated specimens were then aged at two temperatures: 170 and 215 °C. Heat treatments were conducted to explore the microstructure evolution and mechanical properties of the extruded rod. Heat treatments revealed that the age hardening effect was related to the transformation of the microstructure. Over aging during age heat treatment was believed to be caused by the formation of a lamellar structure composed of alternating layers of Mg17Al12 phase and magnesium matrix.

AB - Influence of heat treatment on the properties of the consolidated AZ91D Mg alloy chips was performed in this study. The chips were pressed into a die to form a compact with a green density of 1.6 g/cm3. The 50-mm diameter green compact was then extruded into a 20-mm rod at 350 °C. The extruded rod was solution treated at a temperature of 415 °C for 24 h; the solution treated specimens were then aged at two temperatures: 170 and 215 °C. Heat treatments were conducted to explore the microstructure evolution and mechanical properties of the extruded rod. Heat treatments revealed that the age hardening effect was related to the transformation of the microstructure. Over aging during age heat treatment was believed to be caused by the formation of a lamellar structure composed of alternating layers of Mg17Al12 phase and magnesium matrix.

KW - AZ91D Mg alloy

KW - Age hardening

KW - Lamellar structure

KW - Solid-state recycling

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U2 - 10.1016/j.jmatprotec.2008.11.001

DO - 10.1016/j.jmatprotec.2008.11.001

M3 - 期刊論文

AN - SCOPUS:64549089213

SN - 0924-0136

VL - 209

SP - 4194

EP - 4200

JO - Journal of Materials Processing Technology

JF - Journal of Materials Processing Technology

IS - 8

ER -

Effect of heat treatment on the microstructure and mechanical properties of the consolidated Mg alloy AZ91D machined chips

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Keywords

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