0.3CoCrFeNi高熵合金進(jìn)行處理。按相對(duì)于激光源的位置，合金組織分為3個(gè)部分：內(nèi)部具有細(xì)胞狀結(jié)構(gòu)的中心影響區(qū)，具有長(zhǎng)條結(jié)構(gòu)的邊緣影響區(qū)，以及未受影響的原始晶粒區(qū)域。由于激光引起的快速熔化和凝固，經(jīng)不同功率處理的樣品截面中均觀察到細(xì)胞結(jié)構(gòu)；另外，在激光影響區(qū)邊緣發(fā)現(xiàn)了長(zhǎng)條細(xì)胞結(jié)構(gòu)。之后，將激光處理的樣品分別在660和800 ℃下退火2 h，可以觀察到沿細(xì)胞結(jié)構(gòu)邊界有沉淀相析出。通過(guò)硬度測(cè)試，表明激光表面處理和后續(xù)熱處理相結(jié)合的方法顯著提升了合金的硬度。;The as-cast Al0.3CoCrFeNi high-entropy alloy (HEA) surface was treated by pulsed laser at four different powers (150, 250, 350, 450 W). According to the positions relative to the laser source, HEA structure could be transformed into three parts: the center of laser-affected zone with the cellular structure, the edge of laser-affected zone with the banded cellular structure along the grain boundary, and the unaffected area with original grains. Attributed to the rapid melting and solidification induced by pulsed laser, the cellular structure can be observed in all specimens processed at different powers. Additionally, the long cellular structures can be observed in the edge of the laser-affected zone. Then the specimens after pulsed laser surface treatment were annealed at 660 and 800 °C for 2 h, which leads to the precipitations along the boundaries of the cellular structure. The hardness test results show that the combined method of pulsed laser surface treatment with heat treatment improves the hardness of Al0.3CoCrFeNi HEA remarkably."/>