Characterization of damage evolution in an AM60 magnesium alloy by computed tomography

Conference · Wed Jun 16 04:00:00 EDT 1999

DOI:https://doi.org/10.1063/1.1302064· OSTI ID:750363

Waters, A ^[1]; Green, R E; Martz, H; Dolan, K; Horstemeyer, M; Derrill, R

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1. LLNL

Lawrence Livermore National Lab and Sandia National Laboratories, CA are collaborating on the development of new techniques to study damage evolution and growth in material specimens subjected to mechanical loading. These techniques include metallography, radiography, computed tomography (CT) and modeling. The material specimens being studied include cast magnesium and aluminum alloys, and forged stainless steel. The authors concentrate on characterizing monotonically loaded Mg alloy specimens using CT. Several notched tensile specimens were uniaxially loaded to different percentages of the failure load. Specimens were initially characterized by radiography and computed tomography to determine the preloaded state. Subsequent CT scans were performed after the samples were loaded to different percentages of the load failure. The CT volumetric data are being used to measure void size, distribution and orientation in all three dimensions nondestructively to determine the effect of void growth on the mechanical behavior of the materials.

• Research Organization: Lawrence Livermore National Lab., CA (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 750363
• Report Number(s): UCRL-JC--132804; YN0100000
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
ALUMINIUM ALLOYS
DEFECTS
DIAGNOSTIC TECHNIQUES
MAGNESIUM ALLOYS
MECHANICAL TESTS
MICROSTRUCTURE
STAINLESS STEELS
VOIDS