Crack propagation properties on hip-treated cast aluminum alloys

Masanobu Kubota, Yasuo Ochi, Akira Ishii, Ryoichi Shibata

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Fatigue crack propagation tests with compact type (CT) specimens were carried out using three kinds of cast aluminum alloys designated AC4CH, AC1B and AC7A, which were subjected to hot isostatic pressing (HIP) treatment to reduce microshrinkage. Although the HIP-treated AC4CH showed a significant improvement of high-cycle fatigue strength under a rotating bending load, the crack propagation rate was the highest and the crack propagation threshold was the lowest among the materials included with a conventionally produced AC4CH. Since AC4CH has a eutectic microstructure, and since many fine eutectic silicon particles exist, fatigue cracks propagate easily along the eutectic part of the microstructure. The difference in crack propagation behavior represented by da/dN - ΔK relationship was well evaluated in terms of ΔKeff. Microshrinkage was found to cause a considerable rough fracture surface and secondary cracks, and appeared to conduce the crack closure.

Original languageEnglish
Pages (from-to)193-199
Number of pages7
JournalMaterials Science Research International
Volume4
Issue number3
Publication statusPublished - Sep 1 1998

Fingerprint

Eutectics
Aluminum alloys
Crack propagation
Hot isostatic pressing
Microstructure
Crack closure
Silicon
Fatigue crack propagation
Cracks
Fatigue cracks
Fatigue strength

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Crack propagation properties on hip-treated cast aluminum alloys. / Kubota, Masanobu; Ochi, Yasuo; Ishii, Akira; Shibata, Ryoichi.

In: Materials Science Research International, Vol. 4, No. 3, 01.09.1998, p. 193-199.

Research output: Contribution to journalArticle

Kubota, Masanobu ; Ochi, Yasuo ; Ishii, Akira ; Shibata, Ryoichi. / Crack propagation properties on hip-treated cast aluminum alloys. In: Materials Science Research International. 1998 ; Vol. 4, No. 3. pp. 193-199.
@article{e495cae17fd348d18be8234d6a2e675f,
title = "Crack propagation properties on hip-treated cast aluminum alloys",
abstract = "Fatigue crack propagation tests with compact type (CT) specimens were carried out using three kinds of cast aluminum alloys designated AC4CH, AC1B and AC7A, which were subjected to hot isostatic pressing (HIP) treatment to reduce microshrinkage. Although the HIP-treated AC4CH showed a significant improvement of high-cycle fatigue strength under a rotating bending load, the crack propagation rate was the highest and the crack propagation threshold was the lowest among the materials included with a conventionally produced AC4CH. Since AC4CH has a eutectic microstructure, and since many fine eutectic silicon particles exist, fatigue cracks propagate easily along the eutectic part of the microstructure. The difference in crack propagation behavior represented by da/dN - ΔK relationship was well evaluated in terms of ΔKeff. Microshrinkage was found to cause a considerable rough fracture surface and secondary cracks, and appeared to conduce the crack closure.",
author = "Masanobu Kubota and Yasuo Ochi and Akira Ishii and Ryoichi Shibata",
year = "1998",
month = "9",
day = "1",
language = "English",
volume = "4",
pages = "193--199",
journal = "Materials Science Research International",
issn = "1341-1683",
publisher = "Chapman & Hall",
number = "3",

}

TY - JOUR

T1 - Crack propagation properties on hip-treated cast aluminum alloys

AU - Kubota, Masanobu

AU - Ochi, Yasuo

AU - Ishii, Akira

AU - Shibata, Ryoichi

PY - 1998/9/1

Y1 - 1998/9/1

N2 - Fatigue crack propagation tests with compact type (CT) specimens were carried out using three kinds of cast aluminum alloys designated AC4CH, AC1B and AC7A, which were subjected to hot isostatic pressing (HIP) treatment to reduce microshrinkage. Although the HIP-treated AC4CH showed a significant improvement of high-cycle fatigue strength under a rotating bending load, the crack propagation rate was the highest and the crack propagation threshold was the lowest among the materials included with a conventionally produced AC4CH. Since AC4CH has a eutectic microstructure, and since many fine eutectic silicon particles exist, fatigue cracks propagate easily along the eutectic part of the microstructure. The difference in crack propagation behavior represented by da/dN - ΔK relationship was well evaluated in terms of ΔKeff. Microshrinkage was found to cause a considerable rough fracture surface and secondary cracks, and appeared to conduce the crack closure.

AB - Fatigue crack propagation tests with compact type (CT) specimens were carried out using three kinds of cast aluminum alloys designated AC4CH, AC1B and AC7A, which were subjected to hot isostatic pressing (HIP) treatment to reduce microshrinkage. Although the HIP-treated AC4CH showed a significant improvement of high-cycle fatigue strength under a rotating bending load, the crack propagation rate was the highest and the crack propagation threshold was the lowest among the materials included with a conventionally produced AC4CH. Since AC4CH has a eutectic microstructure, and since many fine eutectic silicon particles exist, fatigue cracks propagate easily along the eutectic part of the microstructure. The difference in crack propagation behavior represented by da/dN - ΔK relationship was well evaluated in terms of ΔKeff. Microshrinkage was found to cause a considerable rough fracture surface and secondary cracks, and appeared to conduce the crack closure.

UR - http://www.scopus.com/inward/record.url?scp=0038808172&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0038808172&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0038808172

VL - 4

SP - 193

EP - 199

JO - Materials Science Research International

JF - Materials Science Research International

SN - 1341-1683

IS - 3

ER -