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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/023/01/0047-0049

    • Keywords

       

      Metal matrix composites; strengthening; work hardening rate; dislocation density

    • Abstract

       

      The strengthening of particulate reinforced metal-matrix composites is associated with a high dislocation density in the matrix due to the difference in coefficient of thermal expansion between the reinforcement and the matrix. While this is valid, the role of work hardening characteristics of the matrix alloys in strengthening of these composites is addressed in the present paper. It is found that commercial purity aluminium which has the lowest work hardening rate exhibits the highest strength increment. This effect is due to increased prismatic punching of dislocations. This relationship of decreasing work hardening rate associated with increasing prismatic punching of dislocations in the order 7075, 2014, 7010, 2024, 6061 and commercial purity aluminium leading to increased strength increments is noted.

    • Author Affiliations

       

      K T Kashyap1 C Ramachandra1 C Dutta1 B Chatterji1

      1. Central Materials and Process Laboratory, Hindustan Aeronautics Limited, Bangalore - 560 017, India

    • Dates

       
      Published
      February 2000
      Manuscript received
      16 September 1999
      Manuscript revised
      6 January 2000

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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