CRACK-GROWTH KINETICS OF 7050-T73651 ALUMINUM-ALLOY UNDER CONSTANT LOAD AT 150-DEGREES-C

SARIOGLU F., ABACHI P., DORUK M.

JOURNAL OF MATERIALS SCIENCE, vol.28, no.6, pp.1430-1434, 1993 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 28 Issue: 6
  • Publication Date: 1993
  • Doi Number: 10.1007/bf00363334
  • Journal Name: JOURNAL OF MATERIALS SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1430-1434
  • Middle East Technical University Affiliated: No

Abstract

Crack growth tests at 150-degrees-C under constant load conditions were performed on compact tension specimens of 7050-T73651 aluminium alloy. The d.c. potential drop method was employed to monitor crack lengths throughout the tests. Fracture mechanics parameters such as the stress intensity factor (K) and energy-rate line integral (C*) were used to establish correlation with the crack propagation rates. As a result of experiments it was found that crack growth rates (da/dt) versus K, over discrete ranges of rates, can be described as a power-law equation in the form da/dt= AK(n). The parameter C* appears to correlate well with the crack propagation rates through a single power law over a wide range of rates.