Jilei Zhang , Dekun Si , Zhenlu Cui , Wenzhe Zhao , Xuhao Wang , Zhijie Liang , Xuran Gong , Xiaoliang Han , Jianhong Gong , Kaikai Song , Zhijie Yan , Laichang Zhang
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引用次数: 0
Abstract
Gradient heterostructure design effectively balances strength and ductility, yet its precise control remains challenging. By applying electron beam surface melting (EBSM) to a cold-rolled CoCrNi multicomponent alloy, three distinct microstructural zones, i.e., coarse columnar grains, fine equiaxed grains, and deformed structures, are artificially regulated. The hardness varies continuously from the surface to the center, and the EBSM-treated sample achieves an optimal balance between strength and ductility under controlled conditions. The underlying strengthening mechanisms can be attributed to the rule of mixtures and hetero-deformation-induced (HDI) strengthening. This work provides valuable insights into the artificial regulation of gradient heterostructures for high-performance alloys.
期刊介绍：
Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences.
A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below.
The scope of the journal includes:
1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes).
2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis.
3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification.
4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.
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