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Dislocation multi-junctions and strain hardening

Author

Listed:
  • Vasily V. Bulatov

    (University of California)

  • Luke L. Hsiung

    (University of California)

  • Meijie Tang

    (University of California)

  • Athanasios Arsenlis

    (University of California)

  • Maria C. Bartelt

    (University of California)

  • Wei Cai

    (University of California
    Stanford University)

  • Jeff N. Florando

    (University of California)

  • Masato Hiratani

    (University of California)

  • Moon Rhee

    (University of California)

  • Gregg Hommes

    (University of California)

  • Tim G. Pierce

    (University of California)

  • Tomas Diaz de la Rubia

    (University of California)

Abstract

Strength in numbers Strain hardening, also called work hardening, is a property of crystalline materials much valued by engineers: under load, strong materials can become even stronger. For many years, strain hardening was thought to arise from pair-wise dislocation collisions in which intersecting dislocations form strength-generating junctions. Now a group working at Lawrence Livermore National Laboratory has shown that this theory is incomplete as it ignores many-body dislocation interactions. New simulations, backed up by experiments on molybdenum crystals, show that crystals harden under strain because dislocation lines bundle together in threes into tight knots that form multiple junctions.

Suggested Citation

  • Vasily V. Bulatov & Luke L. Hsiung & Meijie Tang & Athanasios Arsenlis & Maria C. Bartelt & Wei Cai & Jeff N. Florando & Masato Hiratani & Moon Rhee & Gregg Hommes & Tim G. Pierce & Tomas Diaz de la R, 2006. "Dislocation multi-junctions and strain hardening," Nature, Nature, vol. 440(7088), pages 1174-1178, April.
    • Handle: RePEc:nat:nature:v:440:y:2006:i:7088:d:10.1038_nature04658
    DOI: 10.1038/nature04658
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    Cited by:

    1. Lin Jiang & Mingyu Gong & Jian Wang & Zhiliang Pan & Xin Wang & Dalong Zhang & Y. Morris Wang & Jim Ciston & Andrew M. Minor & Mingjie Xu & Xiaoqing Pan & Timothy J. Rupert & Subhash Mahajan & Enrique, 2022. "Visualization and validation of twin nucleation and early-stage growth in magnesium," Nature Communications, Nature, vol. 13(1), pages 1-11, December.

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