The cavitation erosion resistance of high-entropy FeCoCrNiMo X B 0.2 (X = 0, 0.5, 1), coatings cladded by laser was studied. The test was processed by a magnetostrictive cavitation method in both distilled water and 3.5 wt-% NaCl solution. It was observed that the massloss rate of the coatings rarely increased or even decreased in the first few hours. This study verified that the formation of cavitation pits and extend of cracks due to the mechanical shock were the dominant factors causing cavitation of the coatings. The additional Clexhibited a deteriorative effect on the cavitation erosion performance of this high-entropy alloy coating, which leads to an increase of the mass-loss in NaCl solution than that in distilled water. Moreover, the hardness and stability of the high-entropy coatings were enhanced owing to the increase of Mo content, thus improving the cavitation erosion resistance.

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The determination of allowable differential settlement in bridge transition is a key problem to prevent vehicle jump at bridge head, but there are few theoretical research achievements in this aspect atroduction home and abroad. In this paper, four different structures of the road surface of The Sanyangchuan tunnel and the lead project are studied. The allowable differential settlement of asphalt pavement is calculated by asphalt pavement-layer system, and the allowable differential settlement is calculated by Ladan Lasse transform.