Fretting behavior of Ti-6Al-4V under combined high cycle and low cycle fatigue loading

被引：0

作者：

Namjoshi, S.A. ^{[1
]}

Mall, S. ^{[2
]}

机构：

[1] Department of Aeronautics and Astronautics, Air Force Institute of Technology (AFIT/ENY), Wright-Patterson Air Force Base, 2950 P Street, Dayton, OH 45433-7765, United States

[2] Materials and Manufacturing Directorate (AFRL/MLLMN), Air Force Research Laboratory, Wright Patterson Air Force Base, Dayton, OH 45433-7817, United States

来源：

International Journal of Fatigue | 2001年 / 23卷 / SUPPL. 1期

关键词：

Fatigue of materials - Fatigue testing - Structural loads - Turbines;

D O I：

10.1016/s0142-1123(01)00143-8

中图分类号：

学科分类号：

摘要：

The fretting-fatigue behavior of titanium alloy Ti-6Al-4V under variable-amplitude (V-A) loading was investigated. This involved a two-level block of low-frequency (1 Hz) large-amplitude cycles and high-frequency (200 Hz) low-amplitude cycles, which represented the low- and high-cycle components of the turbine engine mission loading. The measured fretting-fatigue lives were compared with the predicted lives obtained from the Palmgren-Miner linear damage rule as well as from a nonlinear damage rule. These comparisons showed that there is a reasonable agreement between the predicted life from linear rule and the experimental data under variable loading conditions when conventional fatigue life relationships on the semi-logarithmic scales are employed and when the ratio of HCF and LCF cycles is large. However, the Palmgren-Miner linear prediction differs significantly from experimental data when these were compared based on the damage fraction induced by LCF and HCF components of combined cycling, and thus a non-linear method of damage accumulation is more appropriate for estimating the fretting-fatigue life under the V-A loading. Published by Elsevier Science Ltd.

引用

页码：455 / 461