激光沖擊強(qiáng)化在高溫合金材料應(yīng)用上的研究進(jìn)展

激光沖擊強(qiáng)化在高溫合金材料應(yīng)用上的研究進(jìn)展Research progress of applications of laser shock processing on superalloys

激光沖擊處理可促使材料產(chǎn)生較傳統(tǒng)表面強(qiáng)化工藝更優(yōu)的強(qiáng)化效果，并且誘發(fā)的顯微組織變化具有更高的熱穩(wěn)定性，有望對(duì)高溫合金材料的服役性能提升產(chǎn)生有利作用。分別從表面形貌、顯微組織、服役性能等方面介紹激光沖擊強(qiáng)化在不同高溫合金材料上的應(yīng)用研究成果。通過(guò)激光沖擊誘導(dǎo)高溫合金微尺度表面形貌變化相關(guān)研究的分析，提出對(duì)激光沖擊誘導(dǎo)局部反向變形進(jìn)行數(shù)值仿真驗(yàn)證的研究方向?？偨Y(jié)激光沖擊強(qiáng)化在改善高溫合金組織狀態(tài)以及提升疲勞等服役性能方面的研究成果，進(jìn)而指明單晶高溫合金激光沖擊疲勞延壽研究的必要性。

Laser shock processing (LSP) can produce better strengthening effect than the traditional surface strengthening processes, and the induced microstructure change has higher thermal stability, which is expected to have a beneficial effect on the service performance of superalloy materials. The applications of LSP on different superalloy materials were introduced from the aspects of surface topography, microstructure and service performance. The research direction of numerical simulation and verification of local reverse deformation induced by LSP was proposed through the analysis of the LSP-induced microscale surface topography of superalloy. The research results of LSP in improving the microstructure and fatigue performance of superalloy were summarized, and then the study necessity of LSP fatigue prolonging for single crystal superalloy was indicated.

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