Precipitates in Long Term Aging Al 5083 Alloy

Gaosong Yi; Yakun Zhu; David A. Cullen; Alexander T. Derrick; Michael L. Free

doi:10.1002/9781118888438.ch43

Precipitates in Long Term Aging Al 5083 Alloy

Gaosong Yi, Yakun Zhu, David A. Cullen, Alexander T. Derrick, Michael L. Free

Materials MicroAnalysis

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

1 Scopus citations

Abstract

Al 5083 alloy aged at 343 K (70 °C) for 3-30 months was evaluated by high resolution transmission electron microscopy (HRTEM) results show that both thickness and continuity of β phase formed at grain boundaries increase with time. GP zones are observed in Al 5083 aged at 343 K for 3 months for the first time. TEM results reveal that GP zones can form homogeneously with the help of vacancies as well as heterogeneously at dislocations near grain boundaries, and the mechanism are explained in detail. Mg₂Si precipitate was found to form at the grain boundary and energy-dispersive X-ray spectroscopy (EDS) results reveal that a Mg, Si (atomic ratio 1:1) rich phase nucleates at the interface of Mg₂Si-matrix. β' phase(Al₃Mg₂, hexagonal) is observed to form at grain boundaries of Al 5083 alloy aged at 343 K for 30 months. β phase was found at the grain boundary of Al 5083 aged at 343 K for 12 months using EDS.

Original language	English
Title of host publication	Light Metals 2014
Publisher	Wiley Blackwell
Pages	249-253
Number of pages	5
Volume	9781118889084
ISBN (Electronic)	9781118888438
ISBN (Print)	9781118889084
DOIs	https://doi.org/10.1002/9781118888438.ch43
State	Published - Mar 10 2014

Keywords

Al 5083
AlMg
GP zone
Precipitates

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10.1002/9781118888438.ch43

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title = "Precipitates in Long Term Aging Al 5083 Alloy",

abstract = "Al 5083 alloy aged at 343 K (70 °C) for 3-30 months was evaluated by high resolution transmission electron microscopy (HRTEM) results show that both thickness and continuity of β phase formed at grain boundaries increase with time. GP zones are observed in Al 5083 aged at 343 K for 3 months for the first time. TEM results reveal that GP zones can form homogeneously with the help of vacancies as well as heterogeneously at dislocations near grain boundaries, and the mechanism are explained in detail. Mg2Si precipitate was found to form at the grain boundary and energy-dispersive X-ray spectroscopy (EDS) results reveal that a Mg, Si (atomic ratio 1:1) rich phase nucleates at the interface of Mg2Si-matrix. β' phase(Al3Mg2, hexagonal) is observed to form at grain boundaries of Al 5083 alloy aged at 343 K for 30 months. β phase was found at the grain boundary of Al 5083 aged at 343 K for 12 months using EDS.",

keywords = "Al 5083, AlMg, GP zone, Precipitates",

author = "Gaosong Yi and Yakun Zhu and Cullen, {David A.} and Derrick, {Alexander T.} and Free, {Michael L.}",

note = "Publisher Copyright: {\textcopyright} 2014 The Minerals, Metals & Materials Society.",

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doi = "10.1002/9781118888438.ch43",

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T1 - Precipitates in Long Term Aging Al 5083 Alloy

AU - Yi, Gaosong

AU - Zhu, Yakun

AU - Cullen, David A.

AU - Derrick, Alexander T.

AU - Free, Michael L.

PY - 2014/3/10

Y1 - 2014/3/10

N2 - Al 5083 alloy aged at 343 K (70 °C) for 3-30 months was evaluated by high resolution transmission electron microscopy (HRTEM) results show that both thickness and continuity of β phase formed at grain boundaries increase with time. GP zones are observed in Al 5083 aged at 343 K for 3 months for the first time. TEM results reveal that GP zones can form homogeneously with the help of vacancies as well as heterogeneously at dislocations near grain boundaries, and the mechanism are explained in detail. Mg2Si precipitate was found to form at the grain boundary and energy-dispersive X-ray spectroscopy (EDS) results reveal that a Mg, Si (atomic ratio 1:1) rich phase nucleates at the interface of Mg2Si-matrix. β' phase(Al3Mg2, hexagonal) is observed to form at grain boundaries of Al 5083 alloy aged at 343 K for 30 months. β phase was found at the grain boundary of Al 5083 aged at 343 K for 12 months using EDS.

AB - Al 5083 alloy aged at 343 K (70 °C) for 3-30 months was evaluated by high resolution transmission electron microscopy (HRTEM) results show that both thickness and continuity of β phase formed at grain boundaries increase with time. GP zones are observed in Al 5083 aged at 343 K for 3 months for the first time. TEM results reveal that GP zones can form homogeneously with the help of vacancies as well as heterogeneously at dislocations near grain boundaries, and the mechanism are explained in detail. Mg2Si precipitate was found to form at the grain boundary and energy-dispersive X-ray spectroscopy (EDS) results reveal that a Mg, Si (atomic ratio 1:1) rich phase nucleates at the interface of Mg2Si-matrix. β' phase(Al3Mg2, hexagonal) is observed to form at grain boundaries of Al 5083 alloy aged at 343 K for 30 months. β phase was found at the grain boundary of Al 5083 aged at 343 K for 12 months using EDS.

KW - Al 5083

KW - AlMg

KW - GP zone

KW - Precipitates

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VL - 9781118889084

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BT - Light Metals 2014

PB - Wiley Blackwell

ER -

Precipitates in Long Term Aging Al 5083 Alloy

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