Fracture Behavior and Grain Boundary Sliding During High-Temperature Low-Stress Deformation of AZ31 Magnesium Alloy

2017 ◽  
pp. 279-287
Author(s):  
Peiman Shahbeigi Roodposhti ◽  
Korukonda L. Murty
Keyword(s):  
High Temperature ◽  
Magnesium Alloy ◽  
Grain Boundary ◽  
Fracture Behavior ◽  
Grain Boundary Sliding ◽  
Az31 Magnesium Alloy ◽  
Stress Deformation ◽  
Boundary Sliding

Evaluation of Plastic Workability Limit of Magnesium Alloy by Cavitations in High Temperature Uni and Biaxial Test

2012 ◽  
Vol 735 ◽  
pp. 67-72
Author(s):  
Kunio Funami ◽  
Daisuke Yamashita ◽  
Kohji Suzuki ◽  
Masafumi Noda
Keyword(s):  
Fine Structure ◽  
High Temperature ◽  
Magnesium Alloy ◽  
Grain Boundary ◽  
Room Temperature ◽  
Grain Boundary Sliding ◽  
Az31 Magnesium Alloy ◽  
Temperature Deformation ◽  
Alloy Plate ◽  
Boundary Sliding

Abstract. This study examined the critical plastic formability limit of a fine-structure AZ31 magnesium alloy plate under warm and high temperature based on the strength of a magnesium alloy that has cavities at room temperature. The cyclic hot free-forging process as pre-form working following rolling at a light reduction ratio fabricated a fine-structure AZ31 magnesium alloy plate. The appearance of the cavities was examined in detail together with changes in the structure and preparation methods before further damage at high temperatures with increasing uni-and biaxial plastic deformation. The allowable deformation limit in the super plasticity process can be estimated from the strength of the deformed material and forming limit diagram (FLD) at room temperature. During high-temperature deformation, cavities are produced by stress concentrations at grain boundary triple points and striation bands due to grain boundary sliding. The cavitations growth behavior is dependent upon deformation conditions, and a high percentage of large cavities occupy the sample surface as a large amount of grain boundary sliding is present, i.e., as uniform elongation grows larger, the cavity size also increases. In a case where 200% uniaxial strain was applied to a fine-grained structure material at a temperature of 623K under a strain rate of 10-4s-1, the tensile strength at room temperature decreased about 13%, and elongation was 10% less, compared with that of a material to which no load was applied due to the influence of cavities. In a case of biaxial deformation, the values were 28% lower. It is possible to draw a FLD based on the cavity incidence fraction .

scholarly journals Grain boundary sliding mechanism during high temperature deformation of AZ31 Magnesium alloy

2016 ◽  
Vol 669 ◽  
pp. 171-177 ◽  
Author(s):  
Peiman Shahbeigi Roodposhti ◽  
Apu Sarkar ◽  
Korukonda Linga Murty ◽  
Harold Brody ◽  
Ronald Scattergood
Keyword(s):  
High Temperature ◽  
Magnesium Alloy ◽  
Grain Boundary ◽  
Grain Boundary Sliding ◽  
Az31 Magnesium Alloy ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Sliding Mechanism ◽  
Boundary Sliding

Enhanced Grain-Boundary Sliding at Room Temperature in AZ31 Magnesium Alloy

2003 ◽  
Vol 419-422 ◽  
pp. 237-242 ◽  
Author(s):  
R. Ohyama ◽  
Junichi Koike ◽  
T. Kobayashi ◽  
Mayumi Suzuki ◽  
Kouichi Maruyama
Keyword(s):  
Magnesium Alloy ◽  
Grain Boundary ◽  
Room Temperature ◽  
Grain Boundary Sliding ◽  
Az31 Magnesium Alloy ◽  
Boundary Sliding

Influence of Extrusion Methods on Microstructure of Mg-Al-Zn Alloy

2013 ◽  
Vol 575-576 ◽  
pp. 402-405
Author(s):  
Yun Cai ◽  
Guirong Li ◽  
Xue Ting Yuan ◽  
Hong Ming Wang ◽  
Yu Tao Zhao ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Grain Boundary ◽  
Deformation Behavior ◽  
Basal Slip ◽  
Grain Boundary Sliding ◽  
Az31 Magnesium Alloy ◽  
Basal Sliding ◽  
Boundary Sliding ◽  
Zn Alloy ◽  
Main Deformation

The correlation between the deformation behavior and the microstructure of AZ31 magnesium alloy processed by as-extruded and ECAP is investigated in this paper. The grain size of as-extruded AZ31 magnesium alloy is about 30μm which dues to basal and twinning. Twinning is the main deformation behavior for as-extruded AZ31 magnesium alloy. The deformation of as-extruded is mainly caused by basal slip and twinning. The grains of ECAP are further refined to 6μm. With little amount of twins, the refinement of AZ31 magnesium alloy is caused by non-basal sliding. For ECAP precessed sample, grain boundary sliding happens and the proportion of high-angle grains are improved, which makes grain boundary sliding easier. The main deformation mechanism of ECAP is non-basal slip and grains boundary sliding.

Grain boundary sliding at high temperature deformation in cold-rolled ODS ferritic steels

2014 ◽  
Vol 452 (1-3) ◽  
pp. 628-632 ◽  
Author(s):  
Yoshito Sugino ◽  
Shigeharu Ukai ◽  
Bin Leng ◽  
Naoko Oono ◽  
Shigenari Hayashi ◽  
...  
Keyword(s):  
High Temperature ◽  
Grain Boundary ◽  
Grain Boundary Sliding ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Ferritic Steels ◽  
Boundary Sliding ◽  
Cold Rolled

High-temperature grain boundary sliding behavior and grain boundary energy in cubic zirconia bicrystals

2004 ◽  
Vol 52 (8) ◽  
pp. 2349-2357 ◽  
Author(s):  
Hidehiro Yoshida ◽  
Kenji Yokoyama ◽  
Naoya Shibata ◽  
Yuichi Ikuhara ◽  
Taketo Sakuma
Keyword(s):  
High Temperature ◽  
Grain Boundary ◽  
Boundary Energy ◽  
Grain Boundary Sliding ◽  
Grain Boundary Energy ◽  
Cubic Zirconia ◽  
Boundary Sliding
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