Experimental study on tensile property of AZ31B magnesium alloy at different high strain rates and temperatures

Feng, Fan; Huang, Sheng; Zhang, Meng; Hu, Jianhua; Lei, Yu; Zhou, Miaolei; Wu, Dan; Yang, Zhenzhen

doi:10.1016/j.matdes.2013.12.031

Cited by 85 publications

(31 citation statements)

References 16 publications

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“…However, the influence of strain on the flow stress behavior is not considered in Eqs. (1) and (2). In the study, the influence of strain on different material constants of constitutive model was studied.…”

Section: Determination Of Materials Constantsmentioning

confidence: 99%

“…Magnesium alloys have a desirable combination of characteristics such as low density, high specific strength and good recyclability together with good conductivity of electricity and heat, which make them suitable for structural application in automotive, aerospace and electronic industries [1][2][3]. And the preferential selection for magnesium alloys may also due to the fact that their machinability, castability and shielding capability are superior to those of the competing metallic materials such as steels and aluminum alloys [4].…”

Section: Introductionmentioning

confidence: 99%

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Constitutive model for elevated temperature flow stress of AZ41M magnesium alloy considering the compensation of strain

Cai

Chen

Guo

2015

Journal of Alloys and Compounds

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Section: Determination Of Materials Constantsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Constitutive model for elevated temperature flow stress of AZ41M magnesium alloy considering the compensation of strain

Cai

Chen

Guo

2015

Journal of Alloys and Compounds

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“…This is due to the shorter time needed to deform at high strain rates. Furthermore, elongation decreases are caused by the dislocation movement or slip deformation which cannot keep up at high strain rate [27]. In previous studies, Mukai et al [28] also reported that the elongation to fracture of ZK60 decreases at high strain rates.…”

Section: Resultsmentioning

confidence: 97%

“…In previous studies, Mukai et al [28] also reported that the elongation to fracture of ZK60 decreases at high strain rates. Feng et al [27] explained that the reduction of plasticity for AZ31B at high strain rates is caused by the limited time to plastic deformation; hence, the elongation is reduced at high strain rates. Figures 9 and 10 show the effects of high strain rate on the tensile fracture surface of AZ31 and AZ61 magnesium alloys, respectively.…”

Section: Resultsmentioning

confidence: 99%

Effect of tensile strain rates on flow stress for extruded AZ31 and AZ61 magnesium alloys

Latif

Sajuri²,

Syarif

2017

Int. J. Automot. Mech. Eng.

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Aluminium-Zinc (AZ) is a popular series of magnesium alloy and is used in automobile components and structures. In this regard, the AZ series is subject to high velocity and impact loads during accidents. Thus, it is essential that the effect of tensile strain rates i.e., low and intermediate strain rates, on flow stress of extruded AZ31 and AZ61 magnesium alloys is investigated. In this study, tensile test under low strain rates were fixed at 1×10 -4 , 1×10 -3 , 1×10 -2 and 1×10 -1 s -1 , while tensile tests under intermediate strain rates were fixed at 100, 200, 400 and 600 s -1 . The tensile test specimens were prepared with a gage length and diameter of 10 mm and 3 mm, respectively. Flow stress was determined by averaging the values of yield stress and tensile strength of the alloy. The results showed that the flow stresses of both extruded magnesium alloys were strain rate dependent. This is believed to be due to the increasing dislocation density in the materials. Thus, the resistance to deformation increased with an increasing volume of dislocation density for extruded AZ31 and AZ61 alloys. Moreover, the flow stresses of both alloys were strain rate dependent; the activation of critical resolved shear stress (CRSS) of non-basal slip systems for magnesium alloys significantly influenced the deformation mechanism of the materials. Additionally, flow stresses of both magnesium alloys increased at increasing strain rate due to the large numbers of twinning in alloys. Hence, tensile strain rates significantly affect the flow stress and failure mechanism of magnesium alloys.

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“…A significant thermal gradient will result in erroneous stress and strain measurements in the specimen, particularly when the test temperature is over 600 • C where the Young's modulus of steel, a typical bar material, decreases significantly. These challenges limit current Kolsky tension bar tests to a e-mail: bsong@sandia.gov b e-mail: knelso@sandia.gov c e-mail: rjlipin@sandia.gov d e-mail: jbignel@sandia.gov e e-mail: ulrichgb@ornl.gov f e-mail: easo.george@rub.de temperatures below 600 • C [6][7][8][9][10], where the effects of temperature gradients on the steel bars can be neglected [9]. However, special experimental design considerations are required for Kolsky tension bar experiments at higher temperatures.…”

Section: Introductionmentioning

confidence: 99%

Dynamic high-temperature Kolsky tension bar techniques

Song

Nelson

Lipinski

et al. 2015

EPJ Web of Conferences

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Abstract. Kolsky tension bar techniques were modified for dynamic high-temperature tensile characterization of thin-sheet alloys. An induction coil heater was used to heat the specimen while a cooling system was applied to keep the bars at room temperature during heating. A preload system was developed to generate a small pretension load in the bar system during heating in order to compensate for the effect of thermal expansion generated in the high-temperature tensile specimen. A laser system was applied to directly measure the displacements at both ends of the tensile specimen in order to calculate the strain in the specimen. A pair of high-sensitivity semiconductor strain gages was used to measure the weak transmitted force due to the low flow stress in the thin specimen at elevated temperatures. As an example, the high-temperature Kolsky tension bar was used to characterize a DOP-26 iridium alloy in high-strain-rate tension at 860 s −1 /1030 • C.

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Experimental study on tensile property of AZ31B magnesium alloy at different high strain rates and temperatures

Cited by 85 publications

References 16 publications

Constitutive model for elevated temperature flow stress of AZ41M magnesium alloy considering the compensation of strain

Constitutive model for elevated temperature flow stress of AZ41M magnesium alloy considering the compensation of strain

Effect of tensile strain rates on flow stress for extruded AZ31 and AZ61 magnesium alloys

Dynamic high-temperature Kolsky tension bar techniques

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