Modeling of transformation toughening in brittle materials

Conference · Fri Jan 24 04:00:00 EST 1992

DOI:https://doi.org/10.1016/0921-5093(92)90333-V· OSTI ID:10125745

LeSar, R; Rollett, A D ^[1]; Srolovitz, D J ^[2]

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1. Los Alamos National Lab., NM (United States)
2. Michigan Univ., Ann Arbor, MI (United States). Dept. of Materials Science and Engineering

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.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Department of Defense, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 10125745
• Report Number(s): LA-UR--92-371; CONF-9111115--5; ON: DE92008444; CNN: Contract AFOSR-90-0112
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202
360203
FRACTURE PROPERTIES
GRAIN SIZE
MECHANICAL PROPERTIES
MICROSTRUCTURE
MOLYBDENUM SILICIDES
PHASE TRANSFORMATIONS
STRUCTURE AND PHASE STUDIES
ZIRCONIUM OXIDES