Microstructure, residual stress, and nanoindentation properties of GCr15-bearing steel by cryogenic treatment and laser-peening composite strengthening
Source abstract
Abstract
GCr15-bearing steel is widely used in generator bearings. To improve its mechanical properties, the cryogenic treatment and laser-peening (CT + LP) composite strengthening process and properties of GCr15-bearing steel were studied in this paper. The microstructure, residual stress distribution and nanoindentation properties of GCr15-bearing steel under CT + LP composite strengthening were studied by X-ray diffraction, scanning electron microscope, transmission electron microscope, X-ray stress analyzer and nanoindentation instrument. The experimental results showed that the residual compressive stress value and FWHM (full width at half maximum) value of the surface of GCr15-bearing steel increased after CT + LP composite strengthening, and the microstructure characteristics such as dislocation entanglement, proliferation, subgrain boundary and nanocrystalline appeared inside the CT + LP specimen. The nano-hardness and elastic modulus of CT + LP sample were 6.55 and 221.95 GPa, respectively, which were 12.94% and 32.61% higher than that of the untreated sample, respectively. The nanoindentation properties and deformation resistance of GCr15-bearing steel were improved.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Metal Alloys Wear and Properties · Surface Treatment and Residual Stress · Metal and Thin Film Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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