Creep studies of coarse-grained AZ91D magnesium castings

M. Regev; E. Aghion; A. Rosen; M. Bamberger

doi:10.1016/S0921-5093(98)00668-6

Creep studies of coarse-grained AZ91D magnesium castings

M. Regev, E. Aghion, A. Rosen, M. Bamberger

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

106 Scopus citations

Abstract

Creep properties of specimens taken from the core of AZ91D magnesium alloy (9% Al-1% Zn) ingots were investigated in the temperature range 120-180°C and stress range 40-115 MPa. Creep tests were performed under constant and varying loads, solution treated creep specimens were also tested. Observed creep rates are about three orders of magnitude lower than those of pure magnesium and elongations to fracture are at least twice those of pure magnesium. No steady-state stage is observed, however a minimum creep rate is reached after approximately two thirds of the creep life of the specimens. The stress exponent is ≈11 and is independent of temperature and stress. The activation energy decreases with increasing temperature, from 220 to 94 kJ mol^-1. Fractography studies show that the fracture is intergranular.

Original language	English
Pages (from-to)	6-16
Number of pages	11
Journal	Materials Science and Engineering: A
Volume	252
Issue number	1
DOIs	https://doi.org/10.1016/S0921-5093(98)00668-6
State	Published - 31 Aug 1998
Externally published	Yes

Keywords

AZ91D
Creep
Magnesium alloys

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/S0921-5093(98)00668-6

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title = "Creep studies of coarse-grained AZ91D magnesium castings",

abstract = "Creep properties of specimens taken from the core of AZ91D magnesium alloy (9% Al-1% Zn) ingots were investigated in the temperature range 120-180°C and stress range 40-115 MPa. Creep tests were performed under constant and varying loads, solution treated creep specimens were also tested. Observed creep rates are about three orders of magnitude lower than those of pure magnesium and elongations to fracture are at least twice those of pure magnesium. No steady-state stage is observed, however a minimum creep rate is reached after approximately two thirds of the creep life of the specimens. The stress exponent is ≈11 and is independent of temperature and stress. The activation energy decreases with increasing temperature, from 220 to 94 kJ mol-1. Fractography studies show that the fracture is intergranular.",

keywords = "AZ91D, Creep, Magnesium alloys",

author = "M. Regev and E. Aghion and A. Rosen and M. Bamberger",

note = "Funding Information: This research work is sponsored by Dead Sea Works Ltd., Israel. The authors wish to thank M. Plotkin for his assistance with the creep tests. Thanks are also due to R. Cohen and his technical staff, to G. Proactor and to E. Hirsch. ",

year = "1998",

month = aug,

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doi = "10.1016/S0921-5093(98)00668-6",

language = "English",

volume = "252",

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T1 - Creep studies of coarse-grained AZ91D magnesium castings

AU - Regev, M.

AU - Aghion, E.

AU - Rosen, A.

AU - Bamberger, M.

N1 - Funding Information: This research work is sponsored by Dead Sea Works Ltd., Israel. The authors wish to thank M. Plotkin for his assistance with the creep tests. Thanks are also due to R. Cohen and his technical staff, to G. Proactor and to E. Hirsch.

PY - 1998/8/31

Y1 - 1998/8/31

N2 - Creep properties of specimens taken from the core of AZ91D magnesium alloy (9% Al-1% Zn) ingots were investigated in the temperature range 120-180°C and stress range 40-115 MPa. Creep tests were performed under constant and varying loads, solution treated creep specimens were also tested. Observed creep rates are about three orders of magnitude lower than those of pure magnesium and elongations to fracture are at least twice those of pure magnesium. No steady-state stage is observed, however a minimum creep rate is reached after approximately two thirds of the creep life of the specimens. The stress exponent is ≈11 and is independent of temperature and stress. The activation energy decreases with increasing temperature, from 220 to 94 kJ mol-1. Fractography studies show that the fracture is intergranular.

AB - Creep properties of specimens taken from the core of AZ91D magnesium alloy (9% Al-1% Zn) ingots were investigated in the temperature range 120-180°C and stress range 40-115 MPa. Creep tests were performed under constant and varying loads, solution treated creep specimens were also tested. Observed creep rates are about three orders of magnitude lower than those of pure magnesium and elongations to fracture are at least twice those of pure magnesium. No steady-state stage is observed, however a minimum creep rate is reached after approximately two thirds of the creep life of the specimens. The stress exponent is ≈11 and is independent of temperature and stress. The activation energy decreases with increasing temperature, from 220 to 94 kJ mol-1. Fractography studies show that the fracture is intergranular.

KW - AZ91D

KW - Creep

KW - Magnesium alloys

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DO - 10.1016/S0921-5093(98)00668-6

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SN - 0921-5093

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JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 1

ER -

Creep studies of coarse-grained AZ91D magnesium castings

Abstract

Keywords

ASJC Scopus subject areas

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