Negative Strain-Rate Sensitivity of Mg Alloys Containing 18R and 14H Long-Period Stacking-Ordered Phases at Intermediate Temperatures

被引：19

作者：

Cai, Xuecheng ^{[1
]}

Fu, Hui ^{[1
]}

Guo, Jianxin ^{[1
]}

Peng, Qiuming ^{[1
]}

机构：

[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2014年 / 45A卷 / 09期

关键词：

SERRATED FLOW; TENSILE PROPERTIES; BEHAVIOR;

D O I：

10.1007/s11661-014-2348-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The strain-rate sensitivity of a Mg-10Dy-1Zn (wt pct) alloy containing different long-period stacking-ordered (LPSO) phases has been investigated in the strain rate range of 10(-3) to 1 s(-1) from room temperature to 673 K (400 A degrees C). Both alloys containing 18R-LPSO and 14H-LPSO phases show negative strain-rate sensitivity (-0.02 to -0.01) at intermediate temperatures [423 K to 523 K (150 A degrees C to 250 A degrees C)]. The serration behavior of the Mg-10Dy-1Zn alloy containing 18R-LPSO phase is related to dynamic strain aging. However, the appearance of serrated flow in the Mg-10Dy-1Zn alloy containing 14H-LPSO phase is mostly rooted in the formation of microcracks in planes.

引用

页码：3703 / 3707

页数：5

共 22 条

[1] Long-period ordered structure in a high-strength nanocrystalline Mg-1 at% Zn-2 at% Y alloy studied by atomic-resolution Z-contrast STEM [J].

Abe, E ;

Kawamura, Y ;

Hayashi, K ;

Inoue, A .

ACTA MATERIALIA, 2002, 50 (15) :3845-3857

[2] An experimental and numerical investigation of the behaviour of AA5083 aluminium alloy in presence of the Portevin-Le Chatelier effect [J].

Benallal, A. ;

Berstad, T. ;

Borvik, T. ;

Hopperstad, O. S. ;

Koutiri, I. ;

de Codes, R. Nogueira .

INTERNATIONAL JOURNAL OF PLASTICITY, 2008, 24 (10) :1916-1945

[3]

Chaturvedi M., 1972, Metal Science Journal, V6, P16

[4] Seffated flow in magnesium alloy AZ91 [J].

Corby, C ;

Cáceres, CH ;

Lukac, P .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 387 :22-24

[5] YIELD POINTS IN A DILUTE MAGNESIUM-THORIUM ALLOY [J].

COULING, SL .

ACTA METALLURGICA, 1959, 7 (02) :133-134

[6] The Serrated Flow Behavior of Mg-Gd(-Mn-Sc) Alloys [J].

Fang, X. Y. ;

Yi, D. Q. ;

Nie, J. F. .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2009, 40A (11) :2761-2771

[7] Effect of microstructure on creep behaviour of cast Mg97Y2Zn1 (at.%) alloy [J].

Garces, G. ;

Onorbe, E. ;

Dobes, F. ;

Perez, P. ;

Antoranz, J. M. ;

Adeva, P. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2012, 539 :48-55

[8] Deformation behaviour of Mg-0.7 wt.% Nd alloy [J].

Gärtnerová, V ;

Trojanová, Z ;

Jäger, A ;

Palcek, P .

JOURNAL OF ALLOYS AND COMPOUNDS, 2004, 378 (1-2) :180-183

[9] Long period stacking structures observed inMg97Zn1Y2 alloy [J].

Itoi, T ;

Seimiya, T ;

Kawamura, Y ;

Hirohashi, M .

SCRIPTA MATERIALIA, 2004, 51 (02) :107-111

[10] Periodic Segregation of Solute Atoms in Fully Coherent Twin Boundaries [J].

Nie, J. F. ;

Zhu, Y. M. ;

Liu, J. Z. ;

Fang, X. Y. .

SCIENCE, 2013, 340 (6135) :957-960

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