Effect of temperature and strain rate on the hot workability behaviour of Ni–25Cr–14W superalloy: An approach using processing map and constitutive equation
Source abstract
Abstract
The hot workability of Ni–25Cr–14W alloy is studied through isothermal hot compression tests in the temperature (T) range of 1000–1200 °C and in the strain rates(ε̇) of 0.001–10 s−1in a thermomechanical simulator. Flow stress data show stable flow curves at T > 1050 °C and ε̇ < 0.1 s−1. The values of flow stress decrease with increase in T or decrease in ε̇. Based on processing map, safe region for hot workability has been identified in the temperature range of 1000–1200 °C and ε̇ of 0.001–0.1 s−1with maximum efficiency(η) of ~ 44% at 1175 °C and 0.001 s−1. Dynamic recrystallization has been identified as the softening mechanism operating in the material at high temperature and lower ε̇. Incomplete recrystallization of the microstructures was noted during multi-step forging by varying T or ε̇, indicating the importance of maintaining the same during industrial processing.Graphical abstract
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Metallurgy and Material Forming · High Temperature Alloys and Creep · Microstructure and mechanical properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (59)
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