Microhardness and microabrasion behaviour of NiTi shape memory alloy after femtosecond laser shock peening without coating in air

2020 ◽  
Author(s):  
Hao Wang ◽  
Evgeny Gurevich ◽  
Andreas Ostendorf
Keyword(s):  
Shape Memory Alloy ◽  
Femtosecond Laser ◽  
Shape Memory ◽  
Laser Shock Peening ◽  
Niti Shape Memory Alloy ◽  
Laser Shock ◽  
Shock Peening

scholarly journals Mechanical Properties of NiTi Shape Memory Alloy Processed by Laser Shock Peening

2013 ◽  
Vol 40 (11) ◽  
pp. 1103002
Author(s):  
夏伟光 Xia Weiguang ◽  
吴先前 Wu Xianqian ◽  
魏延鹏 Wei Yanpeng ◽  
黄晨光 Huang Chenguang ◽  
王曦 Wang Xi
Keyword(s):  
Mechanical Properties ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Laser Shock Peening ◽  
Niti Shape Memory Alloy ◽  
Laser Shock ◽  
Shock Peening

An Ablation Parameter Study and Micromachining of NiTi Based Shape Memory Alloy Using Femtosecond Laser

2007 ◽  
Author(s):  
Nitin Uppal ◽  
Panos S. Shiakolas
Keyword(s):  
Shape Memory Alloy ◽  
Femtosecond Laser ◽  
Shape Memory ◽  
Smart Materials ◽  
Interaction Mechanism ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Niti Shape Memory Alloy ◽  
Parameter Study ◽  
New Applications

The use of femtosecond lasers for the micromachining of engineering materials with micro and submicron size features is slowly but steadily increasing. This increase though presents challenges in understanding the interaction mechanism of femtosecond laser pulses with a material and defining process parameters for quality machining. This manuscript will present the setup for a 3DOF femtosecond laser microfabrication (FLM) system and its use in studying the ablation (single and multi shot) characteristics and incubation coefficient of nickel-titanium (NiTi) shape memory alloy. Understanding of these characteristics could allow for the identification of new applications of smart materials in the macro, micro, nano and MEMS domains.

Martensitic Transformation in Temporally Shaped Femtosecond Laser Shock Peening 304 Steel

2021 ◽  
pp. 150855
Author(s):  
Yiling Lian ◽  
Yanhong Hua ◽  
Jingya Sun ◽  
Qingsong Wang ◽  
Zhicheng Chen ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Femtosecond Laser ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Shock Peening

scholarly journals Laser Shock Peening of Ti6Al4V Alloy with Combined Nanosecond and Femtosecond Laser Pulses

Metals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 26
Author(s):  
Rujian Sun ◽  
Guangzhi He ◽  
Hailin Bai ◽  
Jianfeng Yan ◽  
Wei Guo
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Laser Shock Peening ◽  
Metallic Materials ◽  
Laser Shock ◽  
Laser Absorption ◽  
Shock Peening ◽  
Surface Morphologies ◽  
Equiaxed Grains

Laser shock peening (LSP) with nanosecond or femtosecond laser pulses is applied to improve the mechanical properties of metallic materials. Thus, it is necessary to compare the effects of different processing methods on microstructure changes and property improvement. In this study, nanosecond LSP (NLSP), femtosecond LSP (FLSP), and LSP with combined nanosecond and femtosecond laser pulses (F-NLSP) are conducted on Ti6Al4V alloys to compare the surface morphologies, in-depth microstructures, and nanohardness changes. In FLSP, the peened surface is smooth, and the affected depth is limited near the peened surface. NLSPed and F-NLSPed samples present rough surfaces due to the severe ablation process. Small equiaxed grains with no preferred grain orientation are denser in F-NLSPed samples than that in NLSPed samples. Compared with NLSPed samples, the affected depth and amplitude of in-depth nanohardness are larger in F-NLSPed samples. This is attributed to the increased laser absorption of incident laser on the treated surface by femtosecond laser pulses. The results in this study show the effects of different LSP methods and provide chances in engineering potentials for material property improvements.

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