HAYNES ® 188 alloy - Haynes International, Inc.

LOW CYCLE FATIGUE PROPERTIESHAYNES® 188 alloy exhibits for strain-controlled tests run machined from bar. Tests werevery good low cycle fatigue in the temperature range from run with fully reversed strainproperties at elevated tempera- 800°F (425°C) to 1600°F (R = -1) at a frequency oftures. Results shown below are (870°C). Samples were 20 cpm (0.33 Hz).2.52.0 -*wCDzzI(1)1.5 -1.00.90.80.70.60.5 -0.4 -x800°F (425°C)j*~discontinued0.3 -tl6000F (870°c)02I1 o3I10~CYCLES TO FAILURE10° 10~COMPARATIVE LOW CYCLE FATIGUE PROPERTIESThe graph below compares (760°C)/1 000 hour pre- again run with fully reversedthe low cycle fatigue lives of a exposed condition. Samples strain (R — 1) at a frequency ofnumber of alloys tested at were machined from plate or 20 cpm (0.33 Hz). TSR = Total800°F (425°C) in both the bar, after exposure for ex- Strain Range.as-received and 1400°Fposed samples. Tests were800°F (425°C) LCF Life for Various Alloys1 60TSR= 10%~50.5 .5woDLiir 40DTSR=065%—30oI—(1) s U)w tu 20-3o 010 —0 0188 230 X 625 617 188 230 X 625 617C As Received1400°F (760°C)/1000 Hr prior exposureHAYNES 188 alloy 10