The dynamic compressive response of a high-strength magnesium alloy and its nanocomposite

被引：23
作者：
Chen, Y. [1 ]
Tekumalla, S. [1 ]
Guo, Y. B. [1 ]
Shabadi, R. [2 ]
Shim, V. P. W. [1 ]
Gupta, M. [1 ]
机构：
[1] Natl Univ Singapore, Dept Mech Engn, 9 Engn Dr 1, Singapore 117575, Singapore
[2] Univ Lille 1 Sci & Technol, UMR CMS 8207, Unite Mat & Transformat, Lab Phys Met & Mat Engn, F-59650 Villeneuve Dascq, France
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 702卷
关键词：
Magnesium nanocomposite; Dynamic compression; Twinning; Solute strengthening; Negative strain rate sensitivity; STRAIN-RATE; GRAIN-SIZE; MICROSTRUCTURAL EVOLUTION; MECHANICAL RESPONSE; DEFORMATION; BEHAVIOR; TENSILE; PHASE; RATES; SLIP;
D O I：
10.1016/j.msea.2017.07.005
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The dynamic compressive mechanical properties of the alloy Mg-4Zn-3Gd-1Ca (wt%) and its nanocomposite Mg4Zn3Gd1Ca-2ZnO were investigated at strain rates up to 1 x 10(3) s(-1), using a Split Hopkinson Pressure Bar (SHPB) tester. Under dynamic loading, the addition of 2 wt% ZnO nanoparticles into the alloy generated a significant strength increase (similar to 100 MPa), attributed largely to grain refinement. Negative strain rate sensitivity of the alloy and its nanocomposite was observed. It is postulated that the strengthening influence of the nanoparticles by retarding twin nucleation/growth at grain boundaries, is significantly weakened as strain rate increases. The yield stress of the materials studied follows the Hall-Petch relationship even when the grain size is less than 1 mu m. It is proposed that the strong solute strengthening from Gd and Ca enhances the critical resolved shear stress for slip and preserves tension twinning as the dominant deformation mechanism for yielding.
引用
收藏
页码：65 / 72
页数：8
相关论文
共 43 条
[1]   Compressive and constitutive analysis of AZ31B magnesium alloy over a wide range of strain rates [J].
Ahmad, I. R. ;
Shu, D. W. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2014, 592 :40-49
[2]   Effect of grain size on high strain rate deformation of rolled Mg-4Y-3RE alloy in compression [J].
Asgari, H. ;
Szpunar, J. A. ;
Odeshi, A. G. ;
Zeng, L. J. ;
Olsson, E. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2015, 633 :92-102
[3]   A rationale for the strong dependence of mechanical twinning on grain size [J].
Barnett, M. R. .
SCRIPTA MATERIALIA, 2008, 59 (07) :696-698
[4]   Influence of grain size on the compressive deformation of wrought Mg-3Al-1Zn [J].
Barnett, MR ;
Keshavarz, Z ;
Beer, AG ;
Atwell, D .
ACTA MATERIALIA, 2004, 52 (17) :5093-5103
[5]   Effect of microstructure on the nucleation of deformation twins in polycrystalline high-purity magnesium: A multi-scale modeling study [J].
Beyerlein, I. J. ;
McCabe, R. J. ;
Tome, C. N. .
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 2011, 59 (05) :988-1003
[6]   Statistical analyses of deformation twinning in magnesium [J].
Beyerlein, I. J. ;
Capolungo, L. ;
Marshall, P. E. ;
McCabe, R. J. ;
Tome, C. N. .
PHILOSOPHICAL MAGAZINE, 2010, 90 (16) :2161-2190
[7]   On the influence of the grain size and solute content on the AE response of magnesium alloys tested in tension and compression [J].
Bohlen, Jan ;
Dobron, Patrik ;
Swiostek, Jacek ;
Letzig, Dietmar ;
Chmelik, Frantisek ;
Lukac, Pavel ;
Kainer, Karl Ulrich .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 462 (1-2) :302-306
[8]   A study of the dynamic compressive response of AZ31/Al2O3 nanocomposites and the influence of nanoparticles [J].
Chen, Y. ;
Guo, Y. B. ;
Gupta, M. ;
Shim, V. P. W. .
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, 2016, 89 :114-123
[9]   Dynamic tensile response of magnesium nanocomposites and the effect of nanoparticles [J].
Chen, Y. ;
Guo, Y. B. ;
Gupta, M. ;
Shim, V. P. W. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 582 :359-367
[10]   Well-tolerated Spirulina extract inhibits influenza virus replication and reduces virus-induced mortality [J].
Chen, Yi-Hsiang ;
Chang, Gi-Kung ;
Kuo, Shu-Ming ;
Huang, Sheng-Yu ;
Hu, I-Chen ;
Lo, Yu-Lun ;
Shih, Shin-Ru .
SCIENTIFIC REPORTS, 2016, 6
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