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Characteristic grain size: Part I description and definition

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Abstract

Characteristic grain size, G c, is defined in the present paper. It indicates an intrinsic size of grain for a given system, and has the following advantages over the average grain size which is based on a statistical mean value of the linear intercept length of grains: (1) The characteristic grain size G c has clear and determined geometric meaning, i. e. G c refers to two times of the area-weighted average height of the surface elements to the centroid of grain or the average length of the chord through the centroid of grain; (2) The value of G c can be directly obtained without introducing any correcting factors such as grain shape or grain size distribution factors. Generally, G c is larger than the average grain size G when the Heyn intercept method is adopted for the grain size measurement.

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Authors and Affiliations

  1. Powder Metallurgy National Key Laboratory, Central South University of Technology, 410083, Changsha, China

    Cao Shunhua

  2. Department of Mechanical Engineering, The Hongkong University of Science & Technology Clear Water Bay, Kowloon, Hongkong

    David Clam

Authors
  1. Cao Shunhua
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  2. David Clam
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Additional information

Project supported by the British Council Academic Link Scheme

Synopsis of the first author Cao Shunhua, lecturer, born in Jan. 1965, strong interest in the following research areas: ceramic composites, FGMs, prototype design of WC-Co alloys, and preparation of β-SiC and sialon powders.

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Cao, S., Clam, D. Characteristic grain size: Part I description and definition. J Cent. South Univ. Technol. 4, 20–23 (1997). https://doi.org/10.1007/s11771-997-0023-2

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  • DOI: https://doi.org/10.1007/s11771-997-0023-2

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