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    The Mechanism of Slip System Activation With Grain Rotation During Superplastic Forming

    Source: Journal of Engineering Materials and Technology:;2022:;volume( 145 ):;issue: 002::page 21007-1
    Author:
    Yang, Junzhou
    ,
    Wu, Jianjun
    ,
    Li, Zhiguo
    ,
    Xie, Hainan
    ,
    Zhang, Zongcai
    ,
    Wang, Mengyuan
    DOI: 10.1115/1.4055779
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The activated slip system of Ti-6Al-4V alloy during the superplastic forming (SPF) was investigated by the in-grain misorientation axes analysis (IGMA), and the mechanisms of slip system activation have been discussed. Depending on the distribution of IGMA, one significant discovery from this study is that all the basal, prismatic, and pyramidal slip systems would be activated. Considering the effective slip systems, Schmid factors, and the Euler angles together, it is suggested that the dominant slip systems not only desired the largest Schmid factors but strongly demand continuous Schmid factors among the adjacent grains. Meanwhile, the estimated critical resolved shear stress (CRSS) on basal <a> and prismatic <a> at the temperature of 920 °C with the strain rate of 10−3 s is given. An original method of roughly estimating dominant slip systems with Euler angles has been introduced, which predicts that grain rotation may change the slip system. Furthermore, the crystal plasticity finite element method (CPFEM) is employed to simulate the evolution of Euler angles, and the grain orientation presents the largest set of significant clusters around the (1¯100) after deformation. Besides, the continuity of the Schmid factor assumption for the activated slip system has also been verified by CPFEM. In addition, the eigenvector corresponding to the eigenvalue λ1 = 1 of Euler angle rotation matrix is calculated to be aligned with the grain rotation axis, which can be applied to describe the grain rotation.
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      The Mechanism of Slip System Activation With Grain Rotation During Superplastic Forming

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4294768
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    contributor authorYang, Junzhou
    contributor authorWu, Jianjun
    contributor authorLi, Zhiguo
    contributor authorXie, Hainan
    contributor authorZhang, Zongcai
    contributor authorWang, Mengyuan
    date accessioned2023-11-29T19:27:08Z
    date available2023-11-29T19:27:08Z
    date copyright12/6/2022 12:00:00 AM
    date issued12/6/2022 12:00:00 AM
    date issued2022-12-06
    identifier issn0094-4289
    identifier othermats_145_2_021007.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4294768
    description abstractThe activated slip system of Ti-6Al-4V alloy during the superplastic forming (SPF) was investigated by the in-grain misorientation axes analysis (IGMA), and the mechanisms of slip system activation have been discussed. Depending on the distribution of IGMA, one significant discovery from this study is that all the basal, prismatic, and pyramidal slip systems would be activated. Considering the effective slip systems, Schmid factors, and the Euler angles together, it is suggested that the dominant slip systems not only desired the largest Schmid factors but strongly demand continuous Schmid factors among the adjacent grains. Meanwhile, the estimated critical resolved shear stress (CRSS) on basal <a> and prismatic <a> at the temperature of 920 °C with the strain rate of 10−3 s is given. An original method of roughly estimating dominant slip systems with Euler angles has been introduced, which predicts that grain rotation may change the slip system. Furthermore, the crystal plasticity finite element method (CPFEM) is employed to simulate the evolution of Euler angles, and the grain orientation presents the largest set of significant clusters around the (1¯100) after deformation. Besides, the continuity of the Schmid factor assumption for the activated slip system has also been verified by CPFEM. In addition, the eigenvector corresponding to the eigenvalue λ1 = 1 of Euler angle rotation matrix is calculated to be aligned with the grain rotation axis, which can be applied to describe the grain rotation.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleThe Mechanism of Slip System Activation With Grain Rotation During Superplastic Forming
    typeJournal Paper
    journal volume145
    journal issue2
    journal titleJournal of Engineering Materials and Technology
    identifier doi10.1115/1.4055779
    journal fristpage21007-1
    journal lastpage21007-14
    page14
    treeJournal of Engineering Materials and Technology:;2022:;volume( 145 ):;issue: 002
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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