Microstructural effects on short fatigue crack propagation in cast Al-Si alloys

Peirong Ren; Philip J. Withers; Zhengxing Zuo; Huihua Feng; Weiqing Huang

doi:10.1016/j.ijfatigue.2023.107788

Microstructural effects on short fatigue crack propagation in cast Al-Si alloys

Peirong Ren, Philip J. Withers, Zhengxing Zuo, Huihua Feng, Weiqing Huang^*

^*Corresponding author for this work

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

4 Citations (Scopus)

Abstract

The role of microstructure on the short fatigue crack behaviour of cast Al-Si alloy under high cycle loading conditions is investigated by tracking the progress of cracks through fine, medium and coarse microstructured samples. Generally, in the early stage of crack growth, short cracks mainly grow transgranularly, with cracks growth close to low index crystallographic planes (mainly {1 0 0}) in some grains and frequently inhibited at grain boundaries. In the late stage, the crack growth mode gradually shifts from crystallographic stage-I to non-crystallographic stage-II. The short cracks grow faster and fluctuate significantly according to local microstructure. Our results show that finer microstructures offer greater crack nucleation and propagation resistance.

Original language	English
Article number	107788
Journal	International Journal of Fatigue
Volume	175
DOIs	https://doi.org/10.1016/j.ijfatigue.2023.107788
Publication status	Published - Oct 2023

Keywords

Cast Al-Si alloy
Crack behaviour
Microstructure
Short fatigue crack

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10.1016/j.ijfatigue.2023.107788

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title = "Microstructural effects on short fatigue crack propagation in cast Al-Si alloys",

abstract = "The role of microstructure on the short fatigue crack behaviour of cast Al-Si alloy under high cycle loading conditions is investigated by tracking the progress of cracks through fine, medium and coarse microstructured samples. Generally, in the early stage of crack growth, short cracks mainly grow transgranularly, with cracks growth close to low index crystallographic planes (mainly {1 0 0}) in some grains and frequently inhibited at grain boundaries. In the late stage, the crack growth mode gradually shifts from crystallographic stage-I to non-crystallographic stage-II. The short cracks grow faster and fluctuate significantly according to local microstructure. Our results show that finer microstructures offer greater crack nucleation and propagation resistance.",

keywords = "Cast Al-Si alloy, Crack behaviour, Microstructure, Short fatigue crack",

author = "Peirong Ren and Withers, {Philip J.} and Zhengxing Zuo and Huihua Feng and Weiqing Huang",

note = "Publisher Copyright: {\textcopyright} 2023",

year = "2023",

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doi = "10.1016/j.ijfatigue.2023.107788",

language = "English",

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T1 - Microstructural effects on short fatigue crack propagation in cast Al-Si alloys

AU - Ren, Peirong

AU - Withers, Philip J.

AU - Zuo, Zhengxing

AU - Feng, Huihua

AU - Huang, Weiqing

PY - 2023/10

Y1 - 2023/10

N2 - The role of microstructure on the short fatigue crack behaviour of cast Al-Si alloy under high cycle loading conditions is investigated by tracking the progress of cracks through fine, medium and coarse microstructured samples. Generally, in the early stage of crack growth, short cracks mainly grow transgranularly, with cracks growth close to low index crystallographic planes (mainly {1 0 0}) in some grains and frequently inhibited at grain boundaries. In the late stage, the crack growth mode gradually shifts from crystallographic stage-I to non-crystallographic stage-II. The short cracks grow faster and fluctuate significantly according to local microstructure. Our results show that finer microstructures offer greater crack nucleation and propagation resistance.

AB - The role of microstructure on the short fatigue crack behaviour of cast Al-Si alloy under high cycle loading conditions is investigated by tracking the progress of cracks through fine, medium and coarse microstructured samples. Generally, in the early stage of crack growth, short cracks mainly grow transgranularly, with cracks growth close to low index crystallographic planes (mainly {1 0 0}) in some grains and frequently inhibited at grain boundaries. In the late stage, the crack growth mode gradually shifts from crystallographic stage-I to non-crystallographic stage-II. The short cracks grow faster and fluctuate significantly according to local microstructure. Our results show that finer microstructures offer greater crack nucleation and propagation resistance.

KW - Cast Al-Si alloy

KW - Crack behaviour

KW - Microstructure

KW - Short fatigue crack

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DO - 10.1016/j.ijfatigue.2023.107788

M3 - Article

AN - SCOPUS:85163803530

SN - 0142-1123

VL - 175

JO - International Journal of Fatigue

JF - International Journal of Fatigue

M1 - 107788

ER -

Microstructural effects on short fatigue crack propagation in cast Al-Si alloys

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