Characterization of high cycle fatigue behavior of a new generation aluminum lithium alloy

被引：68
作者：
De, P. S. [1 ]
Mishra, R. S. [1 ]
Baumann, J. A. [2 ]
机构：
[1] Missouri Univ Sci & Technol, Dept Mat Sci & Engn, Ctr Frict Stir Proc, Rolla, MO 65409 USA
[2] Boeing Co, St Louis, MO USA
来源：
ACTA MATERIALIA | 2011年 / 59卷 / 15期
基金：
美国国家科学基金会;
关键词：
Aluminum alloys; Fatigue; Fracture; SLIP; PRECIPITATION; FRACTURE; TEXTURE; GROWTH;
D O I：
10.1016/j.actamat.2011.06.003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The high cycle fatigue life characteristics of an Al-Li alloy were studied as a function of microstructure. While for the parent microstructure fatigue life decreased as grain size increased, no such effect was noted at high stresses. This decrease in fatigue life was correlated with lower crack initiation life due to small crack effect. Under multiaxial stress conditions, the alloy exhibited intergranular cracking. The cross-linking of intergranular cracks (in the T8 condition) caused a further deterioration in fatigue life. Additionally, planar slip movements (in the T3 condition) in stage I crack propagation were observed. Slip planarity depended on both the sample texture and the nature of the precipitates. Fractographic and textural evidence is presented. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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收藏
页码：5946 / 5960
页数：15
相关论文
共 27 条
[1]  
[Anonymous], METALL T A
[2]  
[Anonymous], ASM INT JOINING ADV
[3]  
[Anonymous], P 2 INT AL LITH C SP
[4]  
[Anonymous], HDB ALUMINUM PHYS ME
[5]  
Belov NA, 2005, MULTICOMPONENT PHASE DIAGRAMS: APPLICATIONS FOR COMMERCIAL ALUMINUM ALLOYS, pV, DOI 10.1016/B978-008044537-3/50000-7
[6]   THEORY OF TORSION TEXTURE DEVELOPMENT [J].
CANOVA, GR ;
KOCKS, UF ;
JONAS, JJ .
ACTA METALLURGICA, 1984, 32 (02) :211-226
[7]   THE MICROSTRUCTURE AND TENSILE PROPERTIES OF A SPLAT-QUENCHED AL-CU-LI-MG-ZR ALLOY [J].
CROOKS, RE ;
STARKE, EA .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1984, 15 (07) :1367-1377
[8]  
De PS, 2008, J TEST EVAL, V36, P402
[9]  
EMBURY JD, 1967, T METALL SOC AIME, V239, P114
[10]   Heterogeneity of crystallographic texture in friction stir welds of aluminum [J].
Field, DP ;
Nelson, TW ;
Hovanski, Y ;
Jata, KV .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2001, 32 (11) :2869-2877
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