難燃性マグネシウム合金の疲労強度特性: 第2報, 疲労強度に及ぼす平均応力の影響

Translated title of the contribution: Fatigue Strength Characteristics of Non-Combustible Mg Alloy: 2nd Report, Effect of Mean Stress on Fatigue Strength

森重 利紀, 前田 祐奈, 濱田 繁, 野口 博司

Research output: Contribution to journalArticlepeer-review

Abstract

Rotating bending tests and tension-compression fatigue tests on non-combustible magnesium alloy were carried out to investigate effect of mean stress on fatigue strength at <I>N</I>=10<SUP>7</SUP>. The ignition point of non-combustible magnesium alloys is about 300 K higher than that of normal magnesium alloys because of calcium addition. It was clarified as follows. (1) In the range of σ<SUB>m</SUB>=0100MPa, fatigue strength at <I>N</I>=10<SUP>7</SUP> of small hole specimens was about 30150% higher than that of small crack specimens. (2) In the range of σ<SUB>m</SUB>>100MPa, fatigue strength at <I>N</I>=10<SUP>7</SUP> of small hole specimens decreased because of static cracks initiating around small hole at the first loading. (3) In the range of σmax<σ<SUB>0.2</SUB>, fatigue strength at <I>N</I>=10<SUP>7</SUP> of smooth specimens was estimated using modified Goodman diagram.
Translated title of the contributionFatigue Strength Characteristics of Non-Combustible Mg Alloy: 2nd Report, Effect of Mean Stress on Fatigue Strength
Original languageJapanese
Pages (from-to)115-121
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume74
Issue number737
DOIs
Publication statusPublished - Jan 25 2008

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