High temperature deformation behavior of As-Cast Al-3Mg-).25Sc alloy

Suresh Kumar, M and Ambresha, M and Venkateswarlu, K and Ranganath, VR (2014) High temperature deformation behavior of As-Cast Al-3Mg-).25Sc alloy. Metallurgical and Materials Transactions A . xxx-1. ISSN 1073-5623

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    Abstract

    High temperature deformation behavior of as-cast Al- 3Mg-0.25Sc alloy was characterized in a wide range of temperatures 573 K to 773 K (300 �C to 500 �C) and strain rates (0.001 to 10 s�1). A threshold stress behavior is observed in the temperature range of 573 K to 673 K (300 �C to 400 �C) due to interaction of dislocations with precipitates. In the temperature range of 573 K to 623 K (300 �C to 350 �C), the dislocations are pinned by precipitates, following Orowan-bowing mechanism. At 673 K (400 �C), the dislocations bypass the particles by climb process. At high temperature and low strain rate of 723 K (450 �C), and 0.001 s�1, respectively, the alloy exhibited high efficiency of power dissipation for opti- 22 mal hot working process.

    Item Type: Journal Article
    Additional Information: Copyright to this article belongs to M/s. Springer, Boston
    Uncontrolled Keywords: Al-Mg-Sc alloys;Superplastic materials;Computer-controlled servo-hydraulic machine
    Subjects: AERONAUTICS > Aeronautics (General)
    CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    Division/Department: Materials Science Division, Materials Science Division, Materials Science Division , Structures Division
    Depositing User: Ms. Alphones Mary
    Date Deposited: 18 Jun 2014 10:01
    Last Modified: 02 Nov 2015 08:53
    URI: http://nal-ir.nal.res.in/id/eprint/11983

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