Stress partitioning in harmonic structure materials at the early stages of tensile loading studied in situ by synchrotron X-ray diffraction

被引:15
作者
Sjogren-Levin, Elis [1 ]
Pantleon, Wolfgang [2 ]
Ahadi, Aylin [3 ]
Hegedus, Zoltan [4 ]
Lienert, Ulrich [4 ]
Tsuji, Nobuhiro [5 ]
Ameyama, Kei [6 ]
Orlov, Dmytro [1 ]
机构
[1] Lund Univ, Dept Mech Engn Sci, Div Mat Engn, LTH, Box 118, S-22100 Lund, Sweden
[2] Tech Univ Denmark, Dept Civil & Mech Engn, Sect Mat & Surface Engn, DK-2800 Lyngby, Denmark
[3] Lund Univ, Dept Mech Engn Sci, Div Mech, LTH, Box 118, S-22100 Lund, Sweden
[4] Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany
[5] Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Yoshida Honmachi, Kyoto 6068501, Japan
[6] Ritsumeikan Univ, Fac Sci & Engn, Dept Mech Engn, 1-1-1 Nojihigashi, Kusatsu, Shiga 5258577, Japan
基金
瑞典研究理事会; 欧盟地平线“2020”;
关键词
Heterogeneous structure; Harmonic structure; Stress partitioning; Synchrotron radiation; X-ray diffraction; MICROSTRUCTURE;
D O I
10.1016/j.scriptamat.2022.115186
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In situ X-ray diffraction was employed to gain insight into the tensile deformation behavior of harmonic structure (HS) nickel. HS consists of a continuous network of fine grains encompassing islands of coarse grains. With the aid of a newly developed separation algorithm, the X-ray diffraction signals from coarse and fine grains were analyzed separately. Using line profile analysis, the evolution of local stresses and microstrains in the respective grain fractions were examined. Several stages were identified during yielding and the onset of plastic defor-mation in HS nickel. The mechanical behavior of the individual fractions was related to the macroscopic behavior of the HS and compared to that of homogeneous counterparts with similar average grain sizes as the grain fractions. The analysis reveals that the stress partitions between the grain fractions and that the plastic deformation of coarse grains within the HS are constrained by the network of fine grains.
引用
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页数:5
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