A special plate-shaped specimen with two symmetrical, straight air gaps in the center portion and a pair of holes for load chucks at the end portion is used for thermal-stress ratcheting experiments. Experimental results on strain growth due to thermal-stress ratcheting are presented for specimens made of types 304 and 316 austenitic stainless steel. The results cover cumulative and incremental strain growths under conditions of load variation and the effect of hot to cold bar area ratio.

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