“NIMS FATIGUE DATA SHEET No. 122: Data sheets on high stress ratio gigacycle fatigue properties of SUS630 stainless steel (16Cr-4Ni-4Cu)”
“NIMS FATIGUE DATA SHEET No. 123: Data sheets on high/low cycle fatigue properties of A7075-T6 aluminum alloy plates (Al-5.6Zn-2.5Mg-1.6Cu)”
SUS630 stainless steel is used in atomic power plants and ship machinery parts/bolts due to its superior strength and corrosion resistance. A7075-T6 aluminum alloy plates are also very strong and used in transport equipment. NIMS performs gigacycle fatigue tests in order to ensure safety in designing, maintaining and managing equipment. Accordingly, fatigue tests of SUS630 were carried out for 10 billion cycles, and strain controlled low cycle fatigue tests and load controlled high cycle fatigue tests of A7075-T6 were conducted for up to 100,000 and 100 million cycles, respectively.
During the gigacycle fatigue tests of SUS630, ultrasonic fatigue tests were also performed. No standard methods had been available for ultrasonic fatigue tests until recently, but a Japan Welding Engineering Society Standard, WES1112, was enacted on March 1, 2017. NIMS researchers were deeply involved in this enactment, and ultrasonic fatigue tests conducted this time complied with the standard.
