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

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

Publikation: Beitrag in Fachzeitschrift › Artikel › Begutachtung

7 Zitate (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.

Titel in Übersetzung	Slow fatigue crack growth in aluminium and magnesium cast alloys in ambient air and in a vacuum
Originalsprache	Deutsch (Österreich)
Seiten (von - bis)	15-23
Seitenumfang	9
Fachzeitschrift	Materialwissenschaft und Werkstofftechnik
Jahrgang	33
Ausgabenummer	1
DOIs	https://doi.org/10.1002/1521-4052(200201)33:1<15::AID-MAWE15>3.0.CO;2-H
Publikationsstatus	Veröffentlicht - 2002
Extern publiziert	Ja

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

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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",

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

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

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JO - Materialwissenschaft und Werkstofftechnik

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

Abstract

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