目录：

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张歌林

本科OOOO能随便给别人吗

1、摘要：为详细揭示纳秒单脉冲激光能量沉积激波减小波阻的机理,分别研究了单脉冲激光能量沉积与正激波相互作用、单脉冲激光能量沉积与弓形激波超声速流场相互作用.鉴于常用数值模拟方法不考虑空气的离解和电离,不能合理模拟激光能量沉积诱导等离子体热核的空间分布,采用泪滴形能量分布,且耦合有限速率化学反应模型,所得到的激波和热核演化过程的数值模拟结果与实验吻合程度高,验证了所提出模拟方法的合理性.分别选取马赫数为92条件下的正激波和弓形激波,入射激光能量大小为1 mJ和12 mJ,研究表明:单脉冲激光能量沉积诱导形成的等离子体热核通过正激波后,形成上下对称的涡环结构;在弓形激波条件下,在波后形成的低压涡环引起波阻减小,这是激波减阻的主要机理.

2、链接：https://www.zhangqiaokeyan.com/academic-journal-cn_infrared-laser-engineering_thesis/020128886255html

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4、摘要：为探究激光熔覆过程中能量密度对NiCoCrAlY涂层组织与性能的影响,在304不锈钢表面制备了NiCoCrAlY涂层.利用X射线衍射仪、扫描电子显微镜分析了NiCoCrAlY涂层的相组成和微观组织.通过显微维氏硬度计和往复摩擦磨损试验机研究了NiCoCrAlY涂层的硬度和耐磨性能.结果表明:NiCoCrAlY涂层气孔数量随激光能量密度增大而减少,熔深和熔高随激光能量密度增大而增大,当激光能量密度为8 kJ/cm2时涂层稀释率最低,同时气孔数量较少.NiCoCrAlY涂层中包含γ/γ'相和β相,微观结构以柱状晶为主,随着激光能量密度的增大,β相含量升高,柱状晶变大.不同激光能量密度下NiCoCrAlY涂层硬度均高于基体,当激光能量密度为8 kJ/cm2时涂层硬度最高,为301 HV0.在往复摩擦磨损实验中,当激光能量密度为8 kJ/cm2时NiCoCrAlY涂层摩擦系数最小为0.46,磨损体积最少为0.2359 mm3,磨损机理主要为磨粒磨损,耐磨性能最好.

张歌林

1、[119] Long, J., Zhang, LJ., Ning, J. et al. Effect of OObient pressure change on pure tungsten laser spot welding [J]. Welding in the World (2022). https://doi.org/1007/s40194-022-01372-

2、[118] Jie Ning, Zheng-Xiong Ma, Lin-Jie Zhang, Di-Pin Wang, Suck-Joo Na. Effects of OOgnesium on microstructure, properties and degradation behaviors of zinc-based alloys prepared by selective laser melting [J]. Materials Research EOOress, 2022, 9(8): 08651

3、[117] Jian Long, Jin-Long Jia, Lin-Jie Zhang, Ming-Xiang Zhuang, Jiu-Hui Wu, Fatigue inhomogeneity of 140 mm thick TOO titanium alloy double-sided electron beOO welded joints [J]. International Journal of Fatigue, 2022, 165: 10721

4、[116] Mirza Zahid Hussain, Jiangtao Xiong, Jinglong Li, Farah Siddique, Lin Jie Zhang et al. Structural characterization of a composite joint prepared during laser welding of Ti–22Al–27Nb intermetallic alloy with an interlayer of Cu-Hf-Ni-Ti-Zr high entropy bulk metallic glass [J]. Composites Part B: Engineering, 2022, 243: 11016