Effects of inclusions, grain boundaries and grain orientations on the fatigue crack initiation and propagation behavior of 2524-T3 Al alloy

被引：151

作者：

Chen, Y. Q. ^{[1
]}

Pan, S. P. ^{[1
]}

Zhou, M. Z. ^{[2
]}

Yi, D. Q. ^{[1
]}

Xu, D. Z. ^{[3
]}

Xu, Y. F. ^{[4
]}

机构：

[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

[2] Bichamp Cutting Technol Co Ltd, Wangcheng Econ Dev Area, Changsha 410200, Hunan, Peoples R China

[3] IIT, Thermal Proc Technol Ctr, Chicago, IL 60616 USA

[4] Xiangtan Univ, Sch Mech Engn, Xiangtan 411105, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2013年 / 580卷

基金：

中国国家自然科学基金;

关键词：

Aluminum alloys; In-situ observation; Microstructure; Fatigue crack behavior; IN-SITU OBSERVATION; FRACTURE-BEHAVIOR; SEM OBSERVATIONS; GROWTH; MICROSTRUCTURE; PHASE; PRECIPITATION; MECHANISMS; STRESS; STAGE;

D O I：

10.1016/j.msea.2013.05.053

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Microstructural aspects have fundamental influences on the fatigue crack characteristics of materials. In this paper, effects of inclusions, grain boundaries (GBs) and grain orientations on the fatigue crack initiation and propagation behavior in a 2524-T3 aluminum alloy have been investigated using in-situ scanning electron microscope (SEM) fatigue testing and electron back scattering diffraction (EBSD). The results show that, potential fatigue cracks tend to nucleate along coarse and closely spaced inclusion particles or high-angle GBs. Coarse inclusion particles drastically accelerate local crack growth rates. A model of series crack growing stages is given based on the observation of initiation and growth of cracks at the inclusion region. GBs serve to impede the crack tip from propagation and cause large angle crack deflections, which greatly affects local crack propagation behaviors. In addition, fatigue crack shows a strong tendency to propagate transgranularly grains with high Schmid factors (SFs) and avoid grains with low SFs. (C) 2013 Elsevier BM. All rights reserved.

引用

页码：150 / 158

页数：9

共 47 条

[1] Bai S., 2011, PROCEDIA ENG, V10, P1214
[2] Describing fatigue crack growth and load ratio effects in Al 2524 T3 alloy with an enhanced exponential model
Baptista, C. A. R. P.
Adib, A. M. L.
Torres, M. A. S.
Pastoukhov, V. A.
[J]. MECHANICS OF MATERIALS, 2012, 51 : 66 - 73
[3] Twinning and orientation relationships of T-phase precipitates in an Al matrix
Chen, Y. Q.
Yi, D. Q.
Jiang, Y.
Wang, B.
Xu, D. Z.
Li, S. C.
[J]. JOURNAL OF MATERIALS SCIENCE, 2013, 48 (08) : 3225 - 3231
[4] Chen Y.Q., 2013, PHILOS MAG IN PRESS
[5] Chen Yu-qiang, 2010, Chinese Journal of Nonferrous Metals, V20, P632
[6] Chen YQ, 2011, RARE METAL MAT ENG, V40, P63
[7] Effect of Ce addition on microstructure of Al20Cu2Mn3 twin phase in an Al-Cu-Mn casting alloy
Chen, Zhongwei
Chen, Pei
Li, Shishun
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2012, 532 : 606 - 609
[8] LOW-FREQUENCY CYCLIC-LOADING STAGE FOR SEM
DAVIDSON, DL
NAGY, A
[J]. JOURNAL OF PHYSICS E-SCIENTIFIC INSTRUMENTS, 1978, 11 (03): : 207 - 210
[9] Effect of aging treatments on the kinetics of fatigue crack growth in 7010 aluminum alloy
Desmukh, Mohammed Noor
Pandey, R. K.
Mukhopadhyay, A. K.
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 435 (318-326): : 318 - 326
[10] Experimental characterization and two-dimensional simulation of short-crack propagation in an austenitic-ferritic duplex steel
Dueber, O.
Kuenkler, B.
Krupp, U.
Christ, H. -J.
Fritzen, C. -P.
[J]. INTERNATIONAL JOURNAL OF FATIGUE, 2006, 28 (09) : 983 - 992

← 1 2 3 4 5 →