Modeling of transformation toughening in brittle materials

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Results from modeling of transformation toughening in brittle materials using a discrete micromechanical model are presented. The material is represented as a two-dimensional triangular array of nodes connected by elastic springs. Microstructural effects are included by varying the spring parameters for the bulk, grain boundaries, and transforming particles. Using the width of the damage zone and the effective compliance (after the initial creation of the damage zone) as measures of fracture toughness, we find that there is a strong dependence of toughness on the amount, size, and shape of the transforming particles, with the maximum toughness achieved with the higher ... continued below

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Pages: (26 p)

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LeSar, R.; Rollett, A.D. (Los Alamos National Lab., NM (United States)) & Srolovitz, D.J. (Michigan Univ., Ann Arbor, MI (United States). Dept. of Materials Science and Engineering) January 24, 1992.

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Description

Results from modeling of transformation toughening in brittle materials using a discrete micromechanical model are presented. The material is represented as a two-dimensional triangular array of nodes connected by elastic springs. Microstructural effects are included by varying the spring parameters for the bulk, grain boundaries, and transforming particles. Using the width of the damage zone and the effective compliance (after the initial creation of the damage zone) as measures of fracture toughness, we find that there is a strong dependence of toughness on the amount, size, and shape of the transforming particles, with the maximum toughness achieved with the higher amounts of the larger particles.

Physical Description

Pages: (26 p)

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OSTI; NTIS; GPO Dep.

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  • High temperature structural silicides workshop, Gaithersburg, MD (United States), 4-6 Nov 1991

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  • Other: DE92008444
  • Report No.: LA-UR-92-371
  • Report No.: CONF-9111115--5
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5718653
  • Archival Resource Key: ark:/67531/metadc1088919

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  • January 24, 1992

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  • Feb. 10, 2018, 10:06 p.m.

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  • April 12, 2019, 4:19 p.m.

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LeSar, R.; Rollett, A.D. (Los Alamos National Lab., NM (United States)) & Srolovitz, D.J. (Michigan Univ., Ann Arbor, MI (United States). Dept. of Materials Science and Engineering). Modeling of transformation toughening in brittle materials, article, January 24, 1992; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1088919/: accessed April 25, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.