Crystal plasticity finite element modelling of the extrusion texture of a magnesium alloy. (July 2015)

• Record Type: Journal Article
• Authors: Shao, Yichuan; Tang, Tao; Li, Dayong; Tang, Weiqin; Peng, Yinghong
• Is Part Of: Modelling and simulation in materials science and engineering. Volume 23:Number 5(2015)
• Page Start: 7092
• Page End: 7098
• Publication Date: 2015-07
• Subjects: Materials -- Mathematical models -- Periodicals; Matériaux -- Modèles mathématiques -- Périodiques; Materials -- Mathematical models; Periodicals; 620.00113
• DOI: 10.1088/0965-0393/23/5/055011
• Languages: English
• ISSNs: 0965-0393

Abstract

<abstract> <title>Abstract</title> <p>In this paper, a crystal plasticity finite-element model (CPFEM) is developed to simulate the hot extrusion texture of the magnesium alloy AZ31. The crystal plasticity model is implemented in ABAQUS<sup>™</sup> via user interface VUMAT subroutine. The elasto-plastic self-consistent (EPSC) model is used as the basic polycrystal framework to simulate the slip and twinning during the extrusion. Furthermore, this framework is extended to account for the effects of the dynamically recrystallized (DRX) grains on the extrusion textures. Good agreement is found between the experimentally measured and simulated textures. The simulation results show that the presence of a secondary texture component around <inline-formula><tex-math><?CDATA $\langle 11.0\rangle $ ?></tex-math><?MML <mml:math display="block"><mml:mrow><mml:mrow><mml:mo>〈</mml:mo><mml:mrow><mml:mn>11.0</mml:mn></mml:mrow><mml:mo>〉</mml:mo></mml:mrow></mml:mrow></mml:math> ?><inline-graphic xlink:href="ark:/27927/pgj14kd2f9j" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></inline-formula> || extrusion direction (ED) can be attributed to the lattice rotation around the <italic>c</italic>-axis during the formation of the DRX grains. In addition, the shear strain imposed on the extruded material affects the resulting texture by enhancing the basal <inline-formula><tex-math><?CDATA $\langle a\rangle $ ?></tex-math><?MML <mml:math display="block"><mml:mrow><mml:mo>〈</mml:mo><mml:mi>a</mml:mi><mml:mo>〉</mml:mo></mml:mrow></mml:math> ?><inline-graphic xlink:href="ark:/27927/pgj14kd2g92" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></inline-formula> slip mode as the material passes through the extrusion opening.</p> </abstract>