ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Charpy samples of low carbon steel were laser-glazed in the V-notch root, resulting in highly modified fracture properties and radially altered crystal structure. Laser-glazing produced two distinct regions: (a) an inner region, next to the bulk material, which was heated above the austenitic transition temperature, was cooled rapidly, and produced a retained austenitic phase, and (b) an outer region, next to the V-notch surface, which was heated above the melting temperature, cooled more slowly, although still very rapidly, and transformed predominantly into the martensite phase. Instrumented impact testing of laser-glazed samples produced fracture energies and fracture toughness values similar to samples prepared by currently accepted ASTM precracking procedures. Laser-glazing is offered as an alternative to existing procedures as an experimental technique for testing fracture toughness samples and, especially, for testing substandard size samples and hard-to-prepare, fracture toughness materials samples.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01112274
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