Effect of ageing treatment on fatigue crack growth of die forged Al-5.87Zn-2.07Mg-2.42Cu alloy

被引：23
作者：
Li, Yao [1 ]
Xe, Guofu [1 ,2 ]
Liu, Shichao [1 ]
Peng, Xiaoyan [1 ]
Yin, Zhimin [1 ]
Wang, Li [3 ]
Liang, Xiaopeng [1 ]
机构：
[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[2] Minist Educ, Key Lab Nonferrous Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[3] Helmholtz Zentrum Geesthacht, Inst Mat Res, Max Planck Str 1, D-21502 Geesthacht, Germany
来源：
ENGINEERING FRACTURE MECHANICS | 2019年 / 215卷
基金：
中国国家自然科学基金;
关键词：
Al-Zn-Mg-Cu aluminum alloy; Ageing treatment; Fatigue-crack growth; Stress intensity range; MG-CU ALLOY; MECHANICAL-PROPERTIES; PROPAGATION BEHAVIOR; GRAIN-BOUNDARIES; ALUMINUM-ALLOYS; HEAT-TREATMENT; STRENGTH; MICROSTRUCTURE; PRECIPITATION; ORIENTATION;
D O I：
10.1016/j.engfracmech.2019.04.023
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The fatigue-crack growth of the die-forged Al-5.87Zn-2.07Mg-2.42Cu alloy at different ageing conditions: peak aged (T6), over aged (T73) and retrogression and re-ageing (RRA), has been examined in the study. The RRA alloy has the highest resistance to fatigue crack initiation. With increasing stress intensity range (Delta k), the T73 sample has the largest expansion rate and it is the smallest for the RRA sample. In the second stage of crack propagation, the crack-growth rate is the largest for the T6 specimen and smallest for the RRA specimen. The crack propagation mode of the alloy in different ageing conditions is mainly based on transgranular expansion. Intergranular expansion was also observed in the T73 state and significant secondary cracks were observed in the RRA sample.
引用
收藏
页码：251 / 260
页数：10
相关论文
共 32 条
[1]   Interpretation of hydrogen-assisted fatigue crack propagation in BCC iron based on dislocation structure evolution around the crack wake [J].
Birenis, Domas ;
Ogawa, Yuhei ;
Matsunaga, Hisao ;
Takakuwa, Osamu ;
Yamabe, Junichiro ;
Prytz, Oystein ;
Thogersen, Annett .
ACTA MATERIALIA, 2018, 156 :245-253
[2]   A new approach to the mechanics of fatigue crack growth in metals: Correlation of mean stress (stress ratio) effects using the change in net-section strain energy [J].
Chandran, K. S. Ravi .
ACTA MATERIALIA, 2017, 135 :201-214
[3]   Transition of crack propagation from a transgranular to an intergranular path in an overaged Al-Zn-Mg-Cu alloy during cyclic loading [J].
Chen, Xu ;
Liu, Zhiyi ;
Xia, Peng ;
Ning, Ailin ;
Zeng, Sumin .
METALS AND MATERIALS INTERNATIONAL, 2013, 19 (02) :197-203
[4]   Effects of inclusions, grain boundaries and grain orientations on the fatigue crack initiation and propagation behavior of 2524-T3 Al alloy [J].
Chen, Y. Q. ;
Pan, S. P. ;
Zhou, M. Z. ;
Yi, D. Q. ;
Xu, D. Z. ;
Xu, Y. F. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 580 :150-158
[5]   Effect of aging treatments on the kinetics of fatigue crack growth in 7010 aluminum alloy [J].
Desmukh, Mohammed Noor ;
Pandey, R. K. ;
Mukhopadhyay, A. K. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 435 (318-326) :318-326
[6]   Influence of precipitates on low-cycle fatigue and crack growth behavior in an ultrafine-grained aluminum alloy [J].
Hockauf, K. ;
Wagner, M. F. -X. ;
Halle, T. ;
Niendorf, T. ;
Hockauf, M. ;
Lampke, T. .
ACTA MATERIALIA, 2014, 80 :250-263
[7]   Fatigue crack growth in a diverse range of materials [J].
Jones, R. ;
Molent, L. ;
Walker, K. .
INTERNATIONAL JOURNAL OF FATIGUE, 2012, 40 :43-50
[8]   Influence of grain structure and slip planarity on fatigue crack growth in low alloying artificially aged 2xxx aluminium alloys [J].
Kamp, N. ;
Gao, N. ;
Starink, M. J. ;
Sinclair, I. .
INTERNATIONAL JOURNAL OF FATIGUE, 2007, 29 (05) :869-878
[9]   Effects of crack orientation on the fatigue crack growth rate and fracture toughness of AA6063 alloy deformed by ECAP [J].
Kazemi, Mohammad Ali ;
Seifi, Rahman .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2018, 733 :71-79
[10]   Effect of pre-immersion on the SCC of heat-treated AA7050 in an alkaline 3.5%NaCl [J].
Liao, Hsueh-Lung ;
Lin, Jing-Chie ;
Lee, Sheng-Long .
CORROSION SCIENCE, 2009, 51 (02) :209-216
1234