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The low temperature thermal ageing embrittlement of austenitic stainless steel welds is investigated after ageing up to 20,000h at 335, 365 and 400°C. Spinodal decomposition and G-phase precipitation after thermal ageing were identified by transmission electron microscopy. Ageing led to increase in hardness of the ferrite phase while there was no change in the hardness of austenite. The degree of...
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