Abstract
Experiments were carried out on SA333 C–Mn steel at 300 °C for different mean stress (σm) and stress amplitude (σa) combinations. The temperature varying tests were carried out at fixed load condition. It was observed that ratcheting strain accumulation and plastic strain amplitude increases, whereas ratcheting life decreases with the increase of mean stress and stress amplitudes. With an increase in temperature, ratcheting life increases and strain accumulation decreases up to 300 °C, whereas on further increase in temperature ratcheting strain accumulation increases with reduction in ratcheting life. It was interesting to note that the minimum ratcheting rate was observed at 250 and 300 °C. The dynamic strain aging (DSA) phenomena lead to the hardening of material at these temperature regimes. The investigated steel shows DSA temperature regime lies between 250 and 300 °C.
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Kumar, G., Bar, H.N., Sivaprasad, S., Kumar, A. (2020). Ratcheting Behavior of SA333 Gr-6 C–Mn Steel at Elevated Temperatures. In: Prakash, R., Suresh Kumar, R., Nagesha, A., Sasikala, G., Bhaduri, A. (eds) Structural Integrity Assessment. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-8767-8_60
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