Analysis of the microstructure and deformation mechanisms by compression along normal direction in a rolled AZ31 magnesium alloy

2016 ◽  
Vol 660 ◽  
pp. 102-107 ◽  
Author(s):  
Dewen Hou ◽  
Tianmo Liu ◽  
Huicong Chen ◽  
Dongfeng Shi ◽  
Chunhua Ran ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Normal Direction ◽  
Deformation Mechanisms ◽  
Az31 Magnesium Alloy

scholarly journals Temperature Dependency on the Microscopic Mechanism in the Normal Direction of Wrought AZ31 Sheet under Dynamic Compressive Behavior

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7436
Author(s):  
Feng Zhang ◽  
Mingcheng Sun ◽  
Baojie Sun ◽  
Fengzheng Zhang ◽  
Yikui Bai ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Dynamic Recrystallization ◽  
Split Hopkinson Pressure Bar ◽  
Equivalent Stress ◽  
Normal Direction ◽  
Deformation Mechanisms ◽  
Az31 Magnesium Alloy ◽  
Hopkinson Pressure Bar ◽  
Microscopic Mechanism ◽  
Az31 Sheet

In order to analyze the competitive relationship of different deformation mechanisms in wrought AZ31 magnesium alloy, the dynamic compressive experiments were conducted by a Split Hopkinson Pressure Bar (SHPB) apparatus and a resistance-heated furnace in the range of temperature between 20 and 350 °C at the strain rate of 1000 s−1. With the help of Electron Backscattered Diffraction (EBSD) observation, theoretical calculated Schmid Factor (SF), Critical Resolved Shear Stress (CRSS), and critical equivalent stress (σ0.2), the dynamic compressive deformation behavior and corresponding mechanism of wrought AZ31 magnesium alloy along the normal direction (ND) were revealed in the current study. The results demonstrate that the c-axis of grains are gradually reoriented parallel to the normal direction of wrought AZ31-ND sheet with the temperature increasing, except the dynamic recrystallization (DRX) mechanism was activated or grains grew up. The non-basal slip and 101¯2 tension twinning are respectively the predominant deformation mechanisms at lower temperatures (≤250 °C) and higher temperatures (≥250 °C). The predominant type of DRX mechanism of wrought AZ31-ND sheet is rotational dynamic recrystallization (RDRX), which is regarded as an obstacle for the kernel misorientation concentration region enhancement.

Synchrotron Radiation Investigation of Twinning in Extruded Magnesium Alloy AZ3l

2005 ◽  
Vol 495-497 ◽  
pp. 1633-1638 ◽  
Author(s):  
Chris H.J. Davies ◽  
Sang Bong Yi ◽  
Jan Bohlen ◽  
Karl Ulrich Kainer ◽  
Heinz Günter Brokmeier
Keyword(s):  
Magnesium Alloy ◽  
Synchrotron Radiation ◽  
Mechanical Behaviour ◽  
Elastic Strain ◽  
Transverse Direction ◽  
Texture Evolution ◽  
Deformation Texture ◽  
Normal Direction ◽  
Az31 Magnesium Alloy

The crystallographic response to deformation – texture evolution, internal elastic strain, and twin evolution – was measured for three load/orientation variants for AZ31 magnesium alloy extrudate tested in-situ in a synchrotron beamline. Specimens were loaded in tension parallel to the extrudate transverse direction, in compression along the same axis, and in compression parallel to the extrudate normal direction. The crystallographic responses are correlated with the mechanical behaviour of the extrudate.

Influence of the strain rate on deformation mechanisms of an AZ31 magnesium alloy

2013 ◽  
Vol 104 (8) ◽  
pp. 762-768 ◽  
Author(s):  
Zuzanka Trojanová ◽  
Tomáš Podrábský ◽  
Pavel Lukáč ◽  
Ronald W. Armstrong ◽  
Josef Pešička ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Strain Rate ◽  
Deformation Mechanisms ◽  
Az31 Magnesium Alloy

Enhancing the fatigue property of rolled AZ31 magnesium alloy by controlling {10-12} twinning-detwinning characteristics

2010 ◽  
Vol 25 (4) ◽  
pp. 784-792 ◽  
Author(s):  
Seong-Gu Hong ◽  
Sung Hyuk Park ◽  
Chong Soo Lee
Keyword(s):  
Plastic Deformation ◽  
Flow Stress ◽  
Magnesium Alloy ◽  
Fatigue Resistance ◽  
Tensile Strain ◽  
Fatigue Property ◽  
Deformation Mechanisms ◽  
Az31 Magnesium Alloy ◽  
Mean Stress ◽  
Fatigue Deformation

An improvement of the fatigue resistance of rolled AZ31 magnesium alloy was attempted by reducing the tensile mean stress developed during fatigue deformation, which was achievable by tailoring the {10-12} twinning-detwinning characteristics of the material through the precompression process. The modification of the {10-12} twinning-detwinning characteristics made it possible to control the plastic deformation mechanisms activated during fatigue deformation so that the imposed tensile strain could be fully accommodated by detwinning alone, which led to a significant reduction of tensile flow stress, finally resulting in the reduction of mean stress.

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