Pregled bibliografske jedinice broj: 1184103
SEM analysis of fracture surfaces of low alloyed Cr- Mo-Nb steel
SEM analysis of fracture surfaces of low alloyed Cr- Mo-Nb steel // Periodicum biologorum, 95 (1993), 2; 275-276 (međunarodna recenzija, članak, znanstveni)
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Naslov
SEM analysis of fracture surfaces of low alloyed Cr-
Mo-Nb steel
Autori
Gojić, Mirko
Izvornik
Periodicum biologorum (0031-5362) 95
(1993), 2;
275-276
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
low alloyes steel, SEM analysis, hydrogen embrittlement, fracture surface
Sažetak
In this work the low alloyed 1.12%Cr-0.63%Mo- 0.035%Nb steel was investigated. After cathodic polarization of the stressed specimens (60% and 80% yield strength) for 2 hours, specimens are tested for fracture with a deformation rate of 2.4x10-4 s-1. The embrittlement indeks is calculated. The specimens in as-rolled condition have a indeks of embrittlement (F=87.6%) and mixed fracture with dominanat brittle cleavage fracture. By quenchnig and tempering at 720oC a ductile fracture is obtained with a small indeks of embrittlement (F=11.1%). The reason for high resistance of Cr-Mo-Nb steel tubing to hydrogen embrittlement is based on the high-tempered martensite microstructure with homogenous dispersed carbides obtained by tempering at a temperature of 700-720oC.
Izvorni jezik
Engleski
Znanstvena područja
Metalurgija
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Časopis indeksira:
- Scopus
