Effect of Delta Ferrite on Microstructure and Mechanical Properties of High-Chromium Martensitic Steel
Source abstract
Abstract
The fusion zone of modified 9Cr-1Mo steel experiencing a peak temperature of 1450 °C and varying cooling rates between 1 and 40 °C/s from the peak temperature is simulated using Gleeble thermal simulator. Mechanical properties of the simulated samples are assessed by ball indentation and impression creep tests. The study evaluates the effect of cooling rate on volume fraction, morphology of retained delta ferrite in the simulated partially melted zone of an autogenous weld, and subsequently its effect on the mechanical properties of this zone. With varying cooling rate, volume fraction of delta ferrite does not change much; however, its morphology changes from polygonal island to grain boundary network in case of excessive slow cooling (1 °C/s). Morphological variation of delta ferrite affects the creep properties of this zone. Partially melted zone, which is cooled at 1 °C/s with delta ferrite present in the interdendritic regions, exhibits maximum creep strain and creep strain rate.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High Temperature Alloys and Creep · Microstructure and Mechanical Properties of Steels · Metal Alloys Wear and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (19)
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