Comparative study of fatigue life behaviour of AA6061 and AA7075 alloys under spectrum loadings

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The study aimed to present several fatigue tests under loading sequences, and to compare the fatigue life behaviour between AA6061 and AA7075 alloys subjected to spectrum loadings at room and elevated temperatures. Constant amplitude loading (CAL), high-to-low and low-to-high loading sequences were derived from a real-time variable amplitude loading that captured from an engine mount bracket of a 1300. cc automobile under normal driving conditions. The shortest fatigue life was found under CAL, followed by the high-to-low and low-to-high loading sequences at both room and elevated temperatures with difference between the maximum and minimum cycles ranged from 7% to 84%. Increased testing temperature (from 27. °C to 250. °C) exponentially decreased the number of cycles by 75-84%. The effect of loading sequence was more significant at room temperature than at elevated temperature.

Original languageEnglish
Pages (from-to)48-57
Number of pages10
JournalMaterials and Design
Volume49
DOIs
Publication statusPublished - 2013

Fingerprint

Fatigue of materials
Temperature
Automobiles
Engines
Testing

Keywords

  • Aluminium alloys
  • Elevated temperatures
  • Fatigue damage
  • Fatigue life
  • Load sequence effect

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

@article{3c99bfe1df4b4fa2aace2c848e09cec6,
title = "Comparative study of fatigue life behaviour of AA6061 and AA7075 alloys under spectrum loadings",
abstract = "The study aimed to present several fatigue tests under loading sequences, and to compare the fatigue life behaviour between AA6061 and AA7075 alloys subjected to spectrum loadings at room and elevated temperatures. Constant amplitude loading (CAL), high-to-low and low-to-high loading sequences were derived from a real-time variable amplitude loading that captured from an engine mount bracket of a 1300. cc automobile under normal driving conditions. The shortest fatigue life was found under CAL, followed by the high-to-low and low-to-high loading sequences at both room and elevated temperatures with difference between the maximum and minimum cycles ranged from 7{\%} to 84{\%}. Increased testing temperature (from 27. °C to 250. °C) exponentially decreased the number of cycles by 75-84{\%}. The effect of loading sequence was more significant at room temperature than at elevated temperature.",
keywords = "Aluminium alloys, Elevated temperatures, Fatigue damage, Fatigue life, Load sequence effect",
author = "Zakaria, {K. A.} and Shahrum Abdullah and Ghazali, {Mariyam Jameelah}",
year = "2013",
doi = "10.1016/j.matdes.2013.01.020",
language = "English",
volume = "49",
pages = "48--57",
journal = "Materials and Design",
issn = "0264-1275",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Comparative study of fatigue life behaviour of AA6061 and AA7075 alloys under spectrum loadings

AU - Zakaria, K. A.

AU - Abdullah, Shahrum

AU - Ghazali, Mariyam Jameelah

PY - 2013

Y1 - 2013

N2 - The study aimed to present several fatigue tests under loading sequences, and to compare the fatigue life behaviour between AA6061 and AA7075 alloys subjected to spectrum loadings at room and elevated temperatures. Constant amplitude loading (CAL), high-to-low and low-to-high loading sequences were derived from a real-time variable amplitude loading that captured from an engine mount bracket of a 1300. cc automobile under normal driving conditions. The shortest fatigue life was found under CAL, followed by the high-to-low and low-to-high loading sequences at both room and elevated temperatures with difference between the maximum and minimum cycles ranged from 7% to 84%. Increased testing temperature (from 27. °C to 250. °C) exponentially decreased the number of cycles by 75-84%. The effect of loading sequence was more significant at room temperature than at elevated temperature.

AB - The study aimed to present several fatigue tests under loading sequences, and to compare the fatigue life behaviour between AA6061 and AA7075 alloys subjected to spectrum loadings at room and elevated temperatures. Constant amplitude loading (CAL), high-to-low and low-to-high loading sequences were derived from a real-time variable amplitude loading that captured from an engine mount bracket of a 1300. cc automobile under normal driving conditions. The shortest fatigue life was found under CAL, followed by the high-to-low and low-to-high loading sequences at both room and elevated temperatures with difference between the maximum and minimum cycles ranged from 7% to 84%. Increased testing temperature (from 27. °C to 250. °C) exponentially decreased the number of cycles by 75-84%. The effect of loading sequence was more significant at room temperature than at elevated temperature.

KW - Aluminium alloys

KW - Elevated temperatures

KW - Fatigue damage

KW - Fatigue life

KW - Load sequence effect

UR - http://www.scopus.com/inward/record.url?scp=84874536793&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84874536793&partnerID=8YFLogxK

U2 - 10.1016/j.matdes.2013.01.020

DO - 10.1016/j.matdes.2013.01.020

M3 - Article

AN - SCOPUS:84874536793

VL - 49

SP - 48

EP - 57

JO - Materials and Design

JF - Materials and Design

SN - 0264-1275

ER -