Experimental investigation on the spiral trepanning of K24 superalloy with femtosecond laser

被引：51

作者：

Wang, Maolu ^{[1
]}

Yang, Lijun ^{[1
]}

Zhang, Shuai ^{[1
]}

Wang, Yang ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mechatron Engn, Harbin 150001, Heilongjiang, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2018年 / 101卷

基金：

美国国家科学基金会;

关键词：

Laser spiral trepanning; Femtosecond laser; Film cooling hole; Energy disperse spectroscopy; ABLATION; METALS;

D O I：

10.1016/j.optlastec.2017.10.029

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Film cooling holes are crucial for improving the performance of the aviation engine. In the paper. the processing of the film cooling holes on K24 superalloy by femtosecond laser is investigated. By comparing the three different drilling methods, the spiral trepanning method is chosen, and all the drilling experiments are carried out in this way. The experimental results show that the drilling of femtosecond laser pulses has distinct merits against that of the traditional long pulse laser, which can realize the "cold" processing with less recasting layer and less crack The influence of each process parameter on roundness and taper, which are the important parameters to measure the quality of holes, is analyzed in detail, and the method to decrease it is proposed. To further reduce the recasting layer, the processing quality of the inner wall of the micro hole is investigated by scanning electron microscopy (SEM) equipped with energy disperse spectroscopy (EDS), the mechanism of the femtosecond laser interaction with K24 super alloy is further revealed. The investigation to the film hole machining by femtosecond laser has important practical significance. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：284 / 290

页数：7

共 15 条

[1]

Banks P.S., 1998, TECH REP, P495

[2] Material effects in ultra-short pulse laser drilling of metals [J].

Banks, PS ;

Feit, MD ;

Rubenchik, AM ;

Stuart, BC ;

Perry, MD .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1999, 69 (Suppl 1) :S377-S380

[3]

Chichkov BN, 1996, APPL PHYS A-MATER, V63, P109, DOI 10.1007/BF01567637

[4] Femtosecond laser machining of single-crystal superalloys through thermal barrier coatings [J].

Feng, Q. ;

Picard, Y. N. ;

McDonald, J. P. ;

van Rompay, P. A. ;

Yalisove, S. M. ;

Pollock, T. M. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 430 (1-2) :203-207

[5]

[郭文渊 Guo Wenyuan], 2003, [激光杂志, Laser Journal], V24, P1

[6]

He Fei, 2007, Chinese Journal of Lasers, V34, P595

[7]

Jia H. N., 2013, TECHNIQUE RES FEMTOS, P1

[8]

Liu J., 1995, AEROENGINE, V2, P31

[9]

PREUSS S, 1995, APPL PHYS A-MATER, V61, P33, DOI 10.1007/BF01538207

[10]

Qi HY, 2008, FAILURE ANAL PREVENT, V1, P15

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