Effects of Mn addition on aging behavior in Al-1%Mg2Si-0.4%Si alloys

Susumu Ikeno; Shizuo Tada; Kenji Matsuda; Yasuhiro Uetani

doi:10.2464/jilm.38.22

Effects of Mn addition on aging behavior in Al-1%Mg₂Si-0.4%Si alloys

Susumu Ikeno, Shizuo Tada, Kenji Matsuda, Yasuhiro Uetani

Materials Design and Engineering

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

Abstract

Aging phenomena of Al-1%Mg₂Si-0.4%Si alloys containing Mn up to 0.8% were studied by means of electrical resistivity measurement, transmission electron microscopy and tensile test. With an increase of Mncontents, the aging rate once decreases and then increases at 150 and 200°C aging. At the peak aging condition at 200°C, mean spacing of precipitates once decreases and then increases with increasing Mn content. In the 0.8% Mn additional alloy aged at 250°C, the aging rate decreases as compared with that of Mn free alloy. This alloy shows absolutly low age-hardenability because extremely coarse precipitates distribute randomly in the matrix. The interface between insoluble particles and matrix act as sinks for excess vacancies, so the heterogeneous nucleation of precipitates and a decrease of aging rate occur due to reduce the excess vacancies in the matrix.

Original language	English
Pages (from-to)	22-28
Number of pages	7
Journal	Keikinzoku/Journal of Japan Institute of Light Metals
Volume	38
Issue number	1
DOIs	https://doi.org/10.2464/jilm.38.22
State	Published - 1988

Keywords

Al-Mg-Si alloy
Mn addition
Mn bearing dispersoid
aging rate
electrical resistivity
tensile test

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.2464/jilm.38.22

Cite this

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title = "Effects of Mn addition on aging behavior in Al-1%Mg2Si-0.4%Si alloys",

abstract = "Aging phenomena of Al-1%Mg2Si-0.4%Si alloys containing Mn up to 0.8% were studied by means of electrical resistivity measurement, transmission electron microscopy and tensile test. With an increase of Mncontents, the aging rate once decreases and then increases at 150 and 200°C aging. At the peak aging condition at 200°C, mean spacing of precipitates once decreases and then increases with increasing Mn content. In the 0.8% Mn additional alloy aged at 250°C, the aging rate decreases as compared with that of Mn free alloy. This alloy shows absolutly low age-hardenability because extremely coarse precipitates distribute randomly in the matrix. The interface between insoluble particles and matrix act as sinks for excess vacancies, so the heterogeneous nucleation of precipitates and a decrease of aging rate occur due to reduce the excess vacancies in the matrix.",

keywords = "Al-Mg-Si alloy, Mn addition, Mn bearing dispersoid, aging rate, electrical resistivity, tensile test",

author = "Susumu Ikeno and Shizuo Tada and Kenji Matsuda and Yasuhiro Uetani",

year = "1988",

doi = "10.2464/jilm.38.22",

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T1 - Effects of Mn addition on aging behavior in Al-1%Mg2Si-0.4%Si alloys

AU - Ikeno, Susumu

AU - Tada, Shizuo

AU - Matsuda, Kenji

AU - Uetani, Yasuhiro

PY - 1988

Y1 - 1988

N2 - Aging phenomena of Al-1%Mg2Si-0.4%Si alloys containing Mn up to 0.8% were studied by means of electrical resistivity measurement, transmission electron microscopy and tensile test. With an increase of Mncontents, the aging rate once decreases and then increases at 150 and 200°C aging. At the peak aging condition at 200°C, mean spacing of precipitates once decreases and then increases with increasing Mn content. In the 0.8% Mn additional alloy aged at 250°C, the aging rate decreases as compared with that of Mn free alloy. This alloy shows absolutly low age-hardenability because extremely coarse precipitates distribute randomly in the matrix. The interface between insoluble particles and matrix act as sinks for excess vacancies, so the heterogeneous nucleation of precipitates and a decrease of aging rate occur due to reduce the excess vacancies in the matrix.

AB - Aging phenomena of Al-1%Mg2Si-0.4%Si alloys containing Mn up to 0.8% were studied by means of electrical resistivity measurement, transmission electron microscopy and tensile test. With an increase of Mncontents, the aging rate once decreases and then increases at 150 and 200°C aging. At the peak aging condition at 200°C, mean spacing of precipitates once decreases and then increases with increasing Mn content. In the 0.8% Mn additional alloy aged at 250°C, the aging rate decreases as compared with that of Mn free alloy. This alloy shows absolutly low age-hardenability because extremely coarse precipitates distribute randomly in the matrix. The interface between insoluble particles and matrix act as sinks for excess vacancies, so the heterogeneous nucleation of precipitates and a decrease of aging rate occur due to reduce the excess vacancies in the matrix.

KW - Al-Mg-Si alloy

KW - Mn addition

KW - Mn bearing dispersoid

KW - aging rate

KW - electrical resistivity

KW - tensile test

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