Selective laser melting of high aspect ratio 3D nickel – titanium structures for MEMS applications

2005 ◽  
Vol 890 ◽  
Author(s):  
Paul Chalker ◽  
Adam Clare ◽  
Sean Davies ◽  
Christopher J. Sutcliffe ◽  
Sozon Tsopanos
Keyword(s):  
Aspect Ratio ◽  
Shape Memory ◽  
Selective Laser Melting ◽  
High Aspect Ratio ◽  
Three Dimensional ◽  
Nickel Titanium ◽  
Niti Shape Memory Alloy ◽  
Laser Melting ◽  
Microelectromechanical Devices ◽  
First Time

ABSTRACTSelective laser melting has been used to build high aspect ratio, three-dimensional NiTi components for the first time. The influence of laser dwell time and raster pitch on the density of NiTi shape memory alloy parts and their resolvable feature sizes are reported. The properties of shape memory springs produced by this method are reported and the application of selective laser melted NiTi components in microelectromechanical devices is discussed.

Selective laser melting of high aspect ratio 3D nickel–titanium structures two way trained for MEMS applications

2007 ◽  
Vol 4 (2) ◽  
pp. 181-187 ◽  
Author(s):  
Adam T. Clare ◽  
Paul R. Chalker ◽  
Sean Davies ◽  
Christopher J. Sutcliffe ◽  
Sozos Tsopanos
Keyword(s):  
Aspect Ratio ◽  
Selective Laser Melting ◽  
High Aspect Ratio ◽  
Nickel Titanium ◽  
Laser Melting

scholarly journals 3D Diatom–Designed and Selective Laser Melting (SLM) Manufactured Metallic Structures

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Izabela Zglobicka ◽  
Agnieszka Chmielewska ◽  
Emre Topal ◽  
Kristina Kutukova ◽  
Jürgen Gluch ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Three Dimensional ◽  
Model Systems ◽  
Self Similarity ◽  
Laser Melting ◽  
Metallic Structures ◽  
Perfect Model ◽  
X Ray Computed ◽  
Biomimetic Approach ◽  
First Time

AbstractDiatom frustules, with their diverse three-dimensional regular silica structures and nano- to micrometer dimensions, represent perfect model systems for biomimetic fabrication of materials and devices. The structure of a frustule of the diatom Didymosphenia geminata was nondestructively visualized using nano X-ray computed tomography (XCT) and transferred into a CAD file for the first time. Subsequently, this CAD file was used as the input for an engineered object, which was manufactured by applying an additive manufacturing technique (3D Selective Laser Melting, SLM) and using titanium powder. The self-similarity of the natural and the engineered objects was verified using nano and micro XCT. The biomimetic approach described in this paper is a proof-of-concept for future developments in the scaling-up of manufacturing based on special properties of microorganisms.

The fabrication of NiTi shape memory alloy by selective laser melting: a review

2019 ◽  
Vol 25 (8) ◽  
pp. 1421-1432 ◽  
Author(s):  
Xizhang Chen ◽  
Kun Liu ◽  
Wei Guo ◽  
Namrata Gangil ◽  
Arshad Noor Siddiquee ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Selective Laser Melting ◽  
Process Analysis ◽  
Research Direction ◽  
Process Equipment ◽  
Niti Shape Memory Alloy ◽  
Laser Melting ◽  
Content Type ◽  
Niti Sma

Purpose In recent years, the use of high performing materials, and application of additive manufacturing technology for industrial production has witnessed a steady rise and its expanse is only to increase in the future. “Selective laser melting (SLM) technique” for an exotic nickel-titanium (NiTi) shape memory alloy (SMA) is expected to a great facilitator to research in this area. The purpose of this paper is to put forth the research direction of NiTi shape memory alloy by selective laser melting. Design/methodology/approach This review also summaries and skims out the information on process equipment, adopted methodologies/strategies, effects of process parameters on important responses e.g. microstructure and comprehensive functional and mechanical properties of SLM-NiTi. In particular, the functional characteristics (i.e. shape memory effects and super-elasticity behavior), process analysis and application status are discussed. Findings Current progresses and challenges in fabricating NiTi-SMA of SLM technology are presented. Practical implications This review is a useful tool for professional and researchers with an interest in the field of SLM of NiTi-SMA. Originality/value This review provides a comprehensive review of the publications related to the SLM techniques of NiTi-SMA while highlighting current challenges and methods of solving them.

Fabrication of Cu-Al-Ni Shape Memory Alloy by Selective Laser Melting Process

2018 ◽  
Vol 941 ◽  
pp. 1570-1573
Author(s):  
Ken Imai ◽  
Toshi Taka Ikeshoji ◽  
Kazuya Nakamura ◽  
Motonori Nishida ◽  
Yuji Sugitani ◽  
...  
Keyword(s):  
Shape Memory ◽  
Selective Laser Melting ◽  
Elastic Anisotropy ◽  
Copper Alloys ◽  
Three Dimensional ◽  
Melting Process ◽  
Laser Melting ◽  
Good Shape ◽  
Ni Alloy ◽  
Scan Speed

Additive manufacturing (AM) is a prominent technology in the industrial fields such as aerospace, medical, automotive and so on. Especially, selective laser melting (SLM) process is available to create three-dimensional complicated structures of various alloys such as stainless steel, titanium alloy, aluminium alloy, nickel-based superalloy and so on. And also, copper and copper alloys are used as a material for products with complicated shape, electrical components, and a heat exchanger because of having the high electrical conductivity and the high thermal conductivity. It is known that copper alloys show a good shape memory behaviour by adding Al, Ni and Zn. Especially, Cu-Al-Ni alloy shows a good shape memory properties at high temperature. However, it is difficult to fabricate high-density Cu-Al-Ni alloy by the SLM process. This is mainly because Cu-Al-Ni alloy has high elastic anisotropy and brittleness in polycrystalline state. In this research, the optimum fabrication condition of Cu-Al-Ni alloy by SLM process was investigated. The optimum laser power and scan speed were able to be found by evaluating the surface morphology, density and microstructure of the as-build specimens.The maximum density of the as-built specimen was 99.47%.

Study on the junction zone of NiTi shape memory alloy produced by selective laser melting via a stripe scanning strategy

2020 ◽  
Vol 126 ◽  
pp. 106947
Author(s):  
Wenqian Guo ◽  
Zhen Sun ◽  
Ying Yang ◽  
Xiebin Wang ◽  
Zhiwei Xiong ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Selective Laser Melting ◽  
Niti Shape Memory Alloy ◽  
Junction Zone ◽  
Laser Melting ◽  
Scanning Strategy
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