Langsames ermüdungsrisswachstum in aluminium- und magnesiumgusslegierungen in raumluft und in vakuum

U. Fuchs; H. Mayer; S. Tschegg; B. Zettl; Hj Lipowsky; A. Stich; M. Papakyriacou

doi:10.1002/1521-4052(200201)33:1<15::AID-MAWE15>3.0.CO;2-H

Langsames ermüdungsrisswachstum in aluminium- und magnesiumgusslegierungen in raumluft und in vakuum

Translated title of the contribution: Slow fatigue crack growth in aluminium and magnesium cast alloys in ambient air and in a vacuum

U. Fuchs, H. Mayer, S. Tschegg, B. Zettl, Hj Lipowsky, A. Stich, M. Papakyriacou

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

7 Citations (Scopus)

Abstract

The influence of ambient air on near threshold fatigue crack growth in the magnesium cast alloys AZ91 hp, AM60 hp and AS21 hp and in the aluminium cast alloy AlSi9Cu3 has been investigated. Fatigue crack growth properties at a cycling frequency of 20 kHz in ambient air and in a vacuum are significantly different. In a vacuum, the threshold stress intensity amplitude of the aluminium alloy is 30% higher than in ambient air, and the threshold values of the magnesium alloys in a vacuum are up to 85% higher than in ambient air. Moisture of ambient air is responsible for accelerated crack growth at growth rates below 1-3 × 10^-9 m/cycle (AlSi9Cu3) and 2-5 × 10^-8 m/cycle (magnesium alloys), respectively. In ambient air a minimum crack growth rate of 5 × 10^-11 - 2 × 10^-10 m/cycle was observed, whereas far lower minimum growth rates were found in a vacuum.

Translated title of the contribution	Slow fatigue crack growth in aluminium and magnesium cast alloys in ambient air and in a vacuum
Original language	German (Austria)
Pages (from-to)	15-23
Number of pages	9
Journal	Materialwissenschaft und Werkstofftechnik
Volume	33
Issue number	1
DOIs	https://doi.org/10.1002/1521-4052(200201)33:1<15::AID-MAWE15>3.0.CO;2-H
Publication status	Published - 2002
Externally published	Yes

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title = "Langsames erm{\"u}dungsrisswachstum in aluminium- und magnesiumgusslegierungen in raumluft und in vakuum",

abstract = "The influence of ambient air on near threshold fatigue crack growth in the magnesium cast alloys AZ91 hp, AM60 hp and AS21 hp and in the aluminium cast alloy AlSi9Cu3 has been investigated. Fatigue crack growth properties at a cycling frequency of 20 kHz in ambient air and in a vacuum are significantly different. In a vacuum, the threshold stress intensity amplitude of the aluminium alloy is 30% higher than in ambient air, and the threshold values of the magnesium alloys in a vacuum are up to 85% higher than in ambient air. Moisture of ambient air is responsible for accelerated crack growth at growth rates below 1-3 × 10-9 m/cycle (AlSi9Cu3) and 2-5 × 10-8 m/cycle (magnesium alloys), respectively. In ambient air a minimum crack growth rate of 5 × 10-11 - 2 × 10-10 m/cycle was observed, whereas far lower minimum growth rates were found in a vacuum.",

author = "U. Fuchs and H. Mayer and S. Tschegg and B. Zettl and Hj Lipowsky and A. Stich and M. Papakyriacou",

year = "2002",

doi = "10.1002/1521-4052(200201)33:1<15::AID-MAWE15>3.0.CO;2-H",

language = "Deutsch ({\"O}sterreich)",

volume = "33",

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T1 - Langsames ermüdungsrisswachstum in aluminium- und magnesiumgusslegierungen in raumluft und in vakuum

AU - Fuchs, U.

AU - Mayer, H.

AU - Tschegg, S.

AU - Zettl, B.

AU - Lipowsky, Hj

AU - Stich, A.

AU - Papakyriacou, M.

PY - 2002

Y1 - 2002

N2 - The influence of ambient air on near threshold fatigue crack growth in the magnesium cast alloys AZ91 hp, AM60 hp and AS21 hp and in the aluminium cast alloy AlSi9Cu3 has been investigated. Fatigue crack growth properties at a cycling frequency of 20 kHz in ambient air and in a vacuum are significantly different. In a vacuum, the threshold stress intensity amplitude of the aluminium alloy is 30% higher than in ambient air, and the threshold values of the magnesium alloys in a vacuum are up to 85% higher than in ambient air. Moisture of ambient air is responsible for accelerated crack growth at growth rates below 1-3 × 10-9 m/cycle (AlSi9Cu3) and 2-5 × 10-8 m/cycle (magnesium alloys), respectively. In ambient air a minimum crack growth rate of 5 × 10-11 - 2 × 10-10 m/cycle was observed, whereas far lower minimum growth rates were found in a vacuum.

AB - The influence of ambient air on near threshold fatigue crack growth in the magnesium cast alloys AZ91 hp, AM60 hp and AS21 hp and in the aluminium cast alloy AlSi9Cu3 has been investigated. Fatigue crack growth properties at a cycling frequency of 20 kHz in ambient air and in a vacuum are significantly different. In a vacuum, the threshold stress intensity amplitude of the aluminium alloy is 30% higher than in ambient air, and the threshold values of the magnesium alloys in a vacuum are up to 85% higher than in ambient air. Moisture of ambient air is responsible for accelerated crack growth at growth rates below 1-3 × 10-9 m/cycle (AlSi9Cu3) and 2-5 × 10-8 m/cycle (magnesium alloys), respectively. In ambient air a minimum crack growth rate of 5 × 10-11 - 2 × 10-10 m/cycle was observed, whereas far lower minimum growth rates were found in a vacuum.

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U2 - 10.1002/1521-4052(200201)33:1<15::AID-MAWE15>3.0.CO;2-H

DO - 10.1002/1521-4052(200201)33:1<15::AID-MAWE15>3.0.CO;2-H

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AN - SCOPUS:0036003664

SN - 0933-5137

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JO - Materialwissenschaft und Werkstofftechnik

JF - Materialwissenschaft und Werkstofftechnik

IS - 1

ER -

Langsames ermüdungsrisswachstum in aluminium- und magnesiumgusslegierungen in raumluft und in vakuum

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