Authors : A.J. Alawode , M.O. Akomolede and A.O. Agbanigo
Abstract: The effects of tempering temperatures of range 30 to 600�C and corrosive action of saltwater medium on the fatigue properties of AISI 410 stainless steel rods were experimentally investigated and presented. Fatigue limit was found to decrease with increase in tempering temperature; at 107 cycles to failure, the fatigue strength of non-corroded as-received specimen increased from 310 to 520 MPa after quenching, while the as-quenched value later decreased to 400 and 340 MPa due to tempering for 30 min at 400 and 600�C, respectively. Also, fatigue life was observed to decrease with increase in tempering temperature. At fatigue stress of 550 MPa, the fatigue life of non-corroded as-received specimen was elongated from 103.8 to 105.7 cycles to failure after quenching, while tempering as-quenched specimen at 400 and 600�C caused its fatigue life to be shortened to 104.8 and 104.0 cycles to failure, respectively. Corrosion in saltwater for 30 days decreased the fatigue strength of as-received specimen at 107 cycles to failure to 292 MPa, while the corroded as-quenched, 400 and 600�C-tempered specimens exhibited relatively improved values of 466, 370 and 316 MPa, respectively. Above 105.5 cycles to failure, decline in fatigue limit due to corrosion was found to decrease with increase in tempering temperature. Also, at the same fatigue stress, corrosion has adverse effects on the fatigue life of the specimens; corrosion caused the fatigue life of as-received specimen to decrease from 103.8 to103.6 cycles to failure, while the corroded as-quenched, 400 and 600�C-tempered specimens displayed relatively elongated fatigue life values of 105.4, 104.7and 103.9cycles to failure.
A.J. Alawode , M.O. Akomolede and A.O. Agbanigo , 2008. Effects of Tempering Temperatures and Corrosion on the Fatigue Behaviours of AISI 410 Stainless Steel Rods. Journal of Engineering and Applied Sciences, 3: 390-395.