Microstructural aspects of crack nucleation during cyclic loading of AA7075-T651

被引：35
|
作者：
Weiland, H. [1 ]
Nardiello, J. [2 ]
Zaefferer, S. [3 ]
Cheong, S. [1 ]
Papazian, J. [2 ]
Raabe, Dierk [3 ]
机构：
[1] Alcoa Inc, Alcoa Ctr, PA 15069 USA
[2] Northrop Grumman AEW EW Syst, Bethpage, NY 11714 USA
[3] Max Planck Inst Iron Res, D-40237 Dusseldorf, Germany
来源：
ENGINEERING FRACTURE MECHANICS | 2009年 / 76卷 / 05期
关键词：
Crack initiation; AA7075; 3D microstructure; Fatigue; ALLOY;
D O I：
10.1016/j.engfracmech.2008.11.012
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A series of fatigue test samples made of 7075-T651 aluminum were interrupted at various life fractions and the number of debonded, cracked particles and cracks in the metal matrix was determined quantitatively as a function of load cycles. It was found that only cracked constituent particles nucleate a matrix crack. The crystallography of one individual crack and its three-dimensional shape was determined by serial sectioning in a scanning electron microscope by applying focused ion beam (FIB) milling in combination with orientation imaging microscopy (OIM). The limited data suggest that the initial growth direction of a crack is influenced by the crystallographic orientation of the matrix into which the crack is growing. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：709 / 714
页数：6
相关论文
共 50 条
  • [41] EBSD Results of Material Flow and Microstructural Changes Around Tool Pin for the Dissimilar Friction Stir Welded AA6082-T6 and AA7075-T651
    Thilagham, K. T.
    Muthukumaran, S.
    TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS, 2020, 73 (10) : 2415 - 2424
  • [42] EBSD Results of Material Flow and Microstructural Changes Around Tool Pin for the Dissimilar Friction Stir Welded AA6082-T6 and AA7075-T651
    K. T. Thilagham
    S. Muthukumaran
    Transactions of the Indian Institute of Metals, 2020, 73 : 2415 - 2424
  • [43] On the mechanical behaviour of AA 7075-T6 during cyclic loading
    Turkmen, HS
    Loge, RE
    Dawson, PR
    Miller, MP
    INTERNATIONAL JOURNAL OF FATIGUE, 2003, 25 (04) : 267 - 281
  • [44] Studies on variations in microstructure and hardness of AA7075-T651 aluminum alloy friction stir welds
    Rao, T. S.
    Reddy, G. M.
    Rao, S. R. K.
    METALLURGIA ITALIANA, 2016, (01): : 29 - 35
  • [45] Optimising salt fog corrosion parameters to minimising the corrosion rate of AA7075-T651 alloy
    Prabhuraj, P.
    Rajakumar, S.
    Balasubramanian, V.
    MATERIALS TODAY-PROCEEDINGS, 2018, 5 (06) : 14573 - 14582
  • [46] INFLUENCE OF POST-WELDING HEAT TREATMENT ON MECHANICAL AND MICROSTRUCTURAL BEHAVIOR OF FRICTION STIR WELDED AA7075-T651 AND AA6061 DISSIMILAR JOINTS
    Yuvaraj, K. P.
    Varthanan, P. Ashoka
    Boopathiraja, K. P.
    HIGH TEMPERATURE MATERIAL PROCESSES, 2018, 22 (01): : 17 - 34
  • [47] Microstructure and mechanical properties of friction stir welded AA7075-T651 aluminum alloy thick plates
    Rao, T. Srinivasa
    Reddy, G. Madhusudhan
    Rao, S. R. Koteswara
    TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2015, 25 (06) : 1770 - 1778
  • [48] Effect of Welding Parameters on Macro and Microstructure of Friction Stir Welded Dissimilar Butt Joints between AA7075-T651 and AA6061-T651 Alloys
    Ravikumar, S.
    SeshagiriRao, V
    Pranesh, R., V
    INTERNATIONAL CONFERENCE ON ADVANCES IN MANUFACTURING AND MATERIALS ENGINEERING (ICAMME 2014), 2014, 5 : 1726 - 1735
  • [49] Investigation of post weld cryogenic treatment on weld strength in friction stir welded dissimilar aluminium alloys AA2014-T651 and AA7075-T651
    Singh, Sarpreet
    Dhuria, Gaurav
    MATERIALS TODAY-PROCEEDINGS, 2017, 4 (08) : 8866 - 8873
  • [50] High strain-rate compressive response of friction stir welded AA7075-T651 joints
    Yokoyama, T.
    Nakai, K.
    ADVANCES IN EXPERIMENTAL MECHANICS V, 2007, 7-8 : 251 - +
12345