Effects of pitting corrosion on the fatigue behavior of aluminum alloy 7075-T6: modeling and experimental studies

被引：192

作者：

Sankaran, KK

Perez, R

Jata, KV

机构：

[1] Boeing Co, St Louis, MO 63166 USA

[2] USAF, Res Lab, Mat & Mfg Directorate, MLLM, Wright Patterson AFB, OH 45433 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2001年 / 297卷 / 1-2期

关键词：

fatigue life prediction; corrosion fatigue; accelerated corrosion tests; pitting corrosion; corrosion metrics;

D O I：

10.1016/S0921-5093(00)01216-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of pitting corrosion on the fatigue behavior of bare 7075-T6 aluminum alloy were investigated. Fitting corrosion decreased the fatigue lives by a factor of about 6 to 8. The fatigue lives were also calculated assuming an equivalent initial flaw corresponding to pits of average and maximum dimensions. The measured fatigue lives generally agreed with the predictions using the average rather than the maximum pit size as the initial crack size. This result could be explained by the pit size distributions offering a significantly larger population of pits near the average size. This work has demonstrated the promise of standardized spray tests for obtaining quantitative measures of corrosion that can be used as inputs in analytical models for fatigue life prediction for evaluating integrity of aircraft structures. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：223 / 229

页数：7

共 11 条

[1]

Barter S., 1994, Eng. Fail. Anal., V1, P255, DOI [10.1016/1350-6307(94)90001-9, DOI 10.1016/1350-6307(94)90001-9]

[2] Effect of prior corrosion on the S/N fatigue performance of aluminum sheet alloys 2024-T3 and 2524-T3 [J].

Bray, GH ;

Bucci, RJ ;

Colvin, EL ;

Kulak, M .

EFFECTS OF THE ENVIRONMENT ON THE INITIATION OF CRACK GROWTH, 1997, 1298 :89-103

[3] Transition from pitting to fatigue crack growth - Modeling of corrosion fatigue crack nucleation in a 2024-T3 aluminum alloy [J].

Chen, GS ;

Wan, KC ;

Gao, M ;

Wei, RP ;

Flournoy, TH .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1996, 219 (1-2) :126-132

[4]

Harter JA, 1999, INT J FATIGUE, V21, pS181

[5]

HARTER JA, 1999, AFRLVAWPTR19993016 U

[6]

Hoeppner D.W., 1979, Fatigue Mechanisms, P841

[7] PREDICTION OF FATIGUE CRACK INITIATION LIFE BASED ON PIT GROWTH [J].

KONDO, Y .

CORROSION, 1989, 45 (01) :7-11

[8]

LYON SB, 1992, AM SOC TEST MATER, V1134, P20, DOI 10.1520/STP19578S

[9]

MILLER KJ, 1993, MATER SCI TECH SER, V9, P453, DOI 10.1179/026708393790172178

[10]

*NAT MAT ADV BOARD, 1997, NMAB4882, P54

← 1 2 →