A Critical Assessment of Cyclic Softening and Hardening Behavior in a Near-α Titanium Alloy During Thermomechanical Fatigue
作者： Kartik Prasad , Rajdeep Sarkar , K Bhanu Sankara Rao , M Sundararaman , None
DOI: 10.1007/S11661-016-3670-9
关键词:
摘要: Thermomechanical fatigue behavior of Ti-alloy Timetal 834 has been studied at two temperature intervals viz. 573 K to 723 K (300 °C 450 °C) and 873 K (450 °C 600 °C) under mechanical strain-controlled cycling. Among the temperatures studied, alloy exhibited initial cyclic softening followed by hardening (450 °C) in interval 450 °C). However, continuous was observed 600 °C). At (300 °C) (600 °C), stress response curves both intervals. The dislocation substructure be planar modes TMF loading. Based on TEM microstructures few unconventional tests, is attributed dynamic strain aging. reduced life OP-TMF loading combined effect (leading early localization crack initiation), oxidation, development tensile mean stresses.
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