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Analysis of reliability of powder metallurgy steels by means of weibull statistics
Author(s) -
Straffelini Giovanni,
Molinari Alberto
Publication year - 1992
Publication title -
quality and reliability engineering international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 62
eISSN - 1099-1638
pISSN - 0748-8017
DOI - 10.1002/qre.4680080103
Subject(s) - weibull distribution , materials science , weibull modulus , ductility (earth science) , ultimate tensile strength , reliability (semiconductor) , porosity , metallurgy , elongation , microstructure , powder metallurgy , composite material , flexural strength , statistics , creep , mathematics , thermodynamics , power (physics) , physics
Porous sintered steels, because of porosity, present low tensile elongation and impact strength, suggesting reduced ductility and consequently poor reliability in structural applications. However, they present some typical features of ductile materials. To study the reliability of these materials, some Fe‐C‐P alloys were selected and tested by means of the Weibull analysis. The results are very encouraging, since they demonstrate that porous sintered steels may be compared to conventional structural steels. The values of the Weibull modulus are affected by the chemical composition, varying between 20 and 55. The aim of this paper is to correlate the microstructural characteristics and the fracture behaviour of the specimens, pointing out how the intrinsic properties of the microstructural constituents affect reliability.