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 contribution | Fatigue Strength Characteristics of Non-Combustible Mg Alloy: 2nd Report, Effect of Mean Stress on Fatigue Strength |
|---|---|
| Original language | Japanese |
| Pages (from-to) | 115-121 |
| Number of pages | 7 |
| Journal | Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A |
| Volume | 74 |
| Issue number | 737 |
| DOIs | |
| Publication status | Published - Jan 25 2008 |