Strengthening the Mechanical Properties of Inconel 625 Superalloy with Gradient Nanotwinned Structure
Source abstract
Abstract
The mechanical properties of Inconel 625, which is a traditional superalloy, have attracted attention in terms of improving its potential. Herein, the tensile behavior of the gradient structure of the Inconel 625 were investigated. The 600-μm-deep gradient nanotwinned (GNT) structure that was obtained featured three layers, and the formation of the structure resulted in a gradient increase in hardness from 2.3 to 7.7 GPa. Compared with the pristine sample, the GNT sample featured a yield strength of 1040 MPa and good ductility. With regulation of the volume fraction of the GNT layer, the synergies of GNT and coarse-grained (CG) structure provide an increase in yield strength (632 MPa) with rather ductile behavior (36%). The synergetic strengthening of GNT and CG structure changes the yield strength and work hardening behavior of Inconel 625 alloy. The increase in yield strength is mainly attributed to the strengthening of GNT surface fine grains and the synergistic strengthening of twins and GNT-CG structure. The high plasticity is mainly attributed to the CG structure and high proportion of nanotwin and twinning in the alloy. This work provides insights on the mechanisms of strengthening of mechanical properties for Inconel 625.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microstructure and mechanical properties · Surface Treatment and Residual Stress · Additive Manufacturing Materials and Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (53)
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