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Discontinuous precipitation at the deformation band in copper alloy

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Abstract

The Cu-Ni-Si alloy is known as a precipitation hardening alloy, where the Ni2Si intermetallic compound is precipitated in the matrix during aging. There are two types of precipitation of Ni2Si: continuous and discontinuous cellular. The discontinuous cellular precipitation is generally initiated at interfaces especially grain boundaries in the matrix. To observe the grain boundary effect on the discontinuous precipitation, a large-grained Cu-Ni-Si-Ti alloy was intentionally fabricated by unidirectional solidification and plastically deformed by groove rolling. While discontinuous cellular precipitation has been generally known to occur only at the high angled grain boundaries in the alloys, we found that it was also generated inside the grains, at the deformation bands formed by plastic deformation.

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Authors and Affiliations

  1. Structural Materials Division, Korea Institute of Materials Science, Changwon, 30147, Republic of Korea

    Seung Zeon Han, Jee Hyuk Ahn & Young Soo You

  2. Department of Materials Science and Engineering, Changwon National University, Changwon, 51140, Republic of Korea

    Jehyun Lee

  3. Department of Mechanical Engineering, Oita University, Oita, 870-1192, Japan

    Masahiro Goto

  4. School of Materials Science and Engineering, Pusan National University, Busan, 46241, Republic of Korea

    Kwangho Kim

  5. Department of Materials Science and Engineering, ReCAPT, Gyeongsang National University, Chinju, 52828, Republic of Korea

    Sangshik Kim

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  1. Seung Zeon Han
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  2. Jee Hyuk Ahn
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  3. Young Soo You
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  4. Jehyun Lee
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  5. Masahiro Goto
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  6. Kwangho Kim
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  7. Sangshik Kim
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Corresponding authors

Correspondence to Jehyun Lee or Kwangho Kim.

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Han, S.Z., Ahn, J.H., You, Y.S. et al. Discontinuous precipitation at the deformation band in copper alloy. Met. Mater. Int. 24, 23–27 (2018). https://doi.org/10.1007/s12540-017-6626-8

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  • DOI: https://doi.org/10.1007/s12540-017-6626-8

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