The grain boundary structure of high-density alloys has an important impact on their properties. Grain boundaries are important microscopic defects in alloy materials and are surface defects. The intergranular structure of metal materials is divided into many smaller domain regions by grain boundaries. The domain regions have a higher integrity of atomic arrangement. There are serious atomic misalignments near the interface between domain regions, and the atomic binding force is relatively small. weak.
The existence of grain boundaries has a great impact on the plasticity, hardness, and corrosion resistance of high-density alloys. For example, cracks caused by stress in the welding heat-affected zone are basically fractures from grain boundaries. At the same time, the existence of grain boundaries has a significant impact on high temperature creep, fatigue, etc. In addition, the grain boundary structure will also affect the thermal conductivity, electrical conductivity and other properties of the alloy.
Therefore, when designing and manufacturing high-density alloys, it is necessary to fully consider the influence of the grain boundary structure, and improve the grain boundary structure by optimizing the composition and preparation process of the alloy to improve the performance and durability of the alloy.
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