Investigation on fatigue-creep interaction, VI. The relationship between high temperature creep-fatigue properties and the tensile and creep ductilities

Autor:	Isao Nitta, Katsuyuki Tokimasa
Rok vydání:	1986
Předmět:	Materials science Creep Mechanics of Materials Mechanical Engineering Metallurgy Ultimate tensile strength Extrapolation General Materials Science Creep fatigue Composite material Condensed Matter Physics Ductility
Zdroj:	Journal of the Society of Materials Science, Japan. 35:274-279
ISSN:	1880-7488 0514-5163
Popis:	Ductility normalized strainrange partitioning (DN-SRP) life relations in a perfect vacuum were determined based on the SRP life relations experimentally obtained both in air and in an imperfect vacuum for three materials: the annealed, the normalized and tempered 21/4 Cr-1 Mo steels and SUS 304 stainless steel.As the results, it is found that they can be given by either set of equations as follows: Δepp=0.5DpNpp-0.5 Δepc=0.145DpNpc-0.5Δecp=0.111DcNcp-0.5Δecc=0.5DcNcc-0.5} or Δepp=Dp0.6Npp-0.6Δepc=(0.192Dp)0.6Npc-0.6Δecp=(0.078Dc)0.6Ncp=0.6Δecc=Dc0.6Ncc-0.6}It is also shown that these DN-SRP life relations can predict a shorter life in the large inelastic strain range than that predicted by extrapolation of air data. So they are important properties even in evaluating the life in air of highly strained structural parts such as notches.
Databáze:	OpenAIRE
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