Laser powder bed fusion of a superelastic Cu-Al-Mn shape memory alloy

Babacan, N.; Pauly, S.; Gustmann, Tobias

doi:10.1016/j.matdes.2021.109625

Cited by 43 publications

(13 citation statements)

References 73 publications

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“…6). The Cu-Al-Ni-Mn [65,67], Cu-Al-Ni-Mn-Zr [64], and Cu-Al-Mn [68] SMA have been successfully fabricated by this technique. Parts with relative density higher than 99% and with a refined columnar microstructure were obtained, with grains aligned to the build direction [67].…”

Section: Recent Developments Of Cu-based Sma New Processing Routes Of Cu-based Shape Memory Alloys (Sma)mentioning

confidence: 99%

“…This is attributed to the recent development of metal alloy manufacturing processes that allow the production of these SMAs with adequate control of texture and grain size, enabling the achievement of superior superelastic properties than those of traditional Cu-Al-Ni and Cu-Al-Zn SMA systems [9,61,95]. Cu-Al-Mn SMA generally have an Al content of less than 18 at% and show excellent ductility and good shape memory effect mainly due to the low degree of ordering of their L2 1 parent phase [9,68,94]. The low-temperature martensitic phases that can be found in these alloys are: α…”

Section: Wwwmrsorg/jmrmentioning

confidence: 99%

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Revisiting Cu-based shape memory alloys: Recent developments and new perspectives

Mazzer

Silva

Gargarella

2022

Journal of Materials Research

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Cu-based shape memory alloys belong to one important class of functional alloys, presenting shape memory effect and superelasticity due to their reversible martensitic transformation. Although they have been extensively studied since the middle of the last century, there are still many challenges to be solved. In the last decades, these alloys were extensively studied regarding new compositions, processing routes, phase transformation, mechanical and functional properties. Aspects of the thermoelastic phase transformation have been described using thermodynamic and thermo-mechanical studies, while the role of metallurgical features (such as grain size and morphology, ordering, precipitates and second phases) have been described mainly by phenomenological approach. In this sense this review discusses the advances in the general fundamentals of Cu-based shape memory alloys, the recent developments in processing routes, compositions, and applications in the last years. Graphical abstract

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Section: Recent Developments Of Cu-based Sma New Processing Routes Of Cu-based Shape Memory Alloys (Sma)mentioning

confidence: 99%

Section: Wwwmrsorg/jmrmentioning

confidence: 99%

Revisiting Cu-based shape memory alloys: Recent developments and new perspectives

Mazzer

Silva

Gargarella

2022

Journal of Materials Research

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“…LBAM permits to fabricate not only components with complicated shape, but also with designed microstructures and functions. Thus, LBAM also bears great potential for the preparation of novel functional materials, such as shape memory materials [24][25][26][27][28][29][30][31]. LBAM enables the manufacturing of multi-functional and high-performance metallic components, significantly expanding its applicability.…”

Section: Introductionmentioning

confidence: 99%

Feedstock preparation, microstructures and mechanical properties for laser-based additive manufacturing of steel matrix composites

Chen,

Kosiba,

Suryanarayana

et al. 2023

International Materials Reviews

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Laser-based additive manufacturing (LBAM) has shown great potential in the development of new metallic materials, especially in the design and fabrication of metal matrix composites (MMCs). Steel matrix composites (SMCs) as one MMC-type, have been successfully additively manufactured with full density and good performance. This article reviews emerging studies of LBAM-fabricated SMCs, starting from the methods of feedstock preparation including respective merits and challenges. The mechanisms of phase transformation, grain growth and texture development of the steel matrix, as well as the precipitation of reinforcements during rapid solidification inherent to LBAM are demonstrated. Microstructural features of SMCs with different matrix (austenitic, martensitic, duplex and ferritic) and reinforcement types are discussed. The interrelationship between the composition and physical properties of the composite powder, microstructures and mechanical properties of SMCs are disclosed and the involved strengthening mechanisms are discussed. Lastly, conclusions and outlook focusing on emerging trends of LBAM-fabricated SMCs are presented.

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“…Therefore, with the increase of energy density, the samples showed decreased SME and decreased microhardness. Babacan et al [ 28 ] have investigated the influence of processing paraments on Cu–Al–Mn processability and successfully obtained crack‐free specimens. Due to rapid cooling rate of LPBF, the samples did not require additional heat treatment to dissolve α precipitates and promote SME performance.…”

Section: Introductionmentioning

confidence: 99%

Laser Powder Bed Fusion of Cu–Al–Ni–Mn Shape‐Memory Alloy for the Application of Active Heat Sinks: Processability, Microstructures, and Shape‐Memory Effect

Lin,

Tian,

et al. 2023

Adv Eng Mater

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Cu‐based shape memory alloys (Cu‐based SMAs) demonstrate prospects in active heat sinks due to their excellent thermal conductivity, high transformation temperature and low‐cost. However, their inferior mechanical properties have hindered their industrial application. Previous studies have indicated that mechanical properties can be improved by decreasing grain size and minimizing microstructural segregation, which can be achieved by laser powder bed fusion (LPBF) process. This work investigates the influence of process parameters on the processability, microstructure, and shape memory effect (SME) of 81.95Cu‐11.85Al‐3.2Ni‐3Mn (wt. %) thin‐walled samples fabricated by LPBF. Results reveal that laser power and scanning speed significantly affected the relative density of the Cu‐based SMA thin‐walled samples, higher laser power and scanning speed contributed to better processability. Additionally, the high cooling rate during the LPBF process facilitated the formation of β1’ martensite without requiring post‐treatment, and the size of the β1’ martensite decreased with increasing scanning speed. In bending‐recovery experiments, specimens fabricated at higher scanning speed exhibited the highest SME recovery rate and bending angle. Moreover, the test confirms that Cu‐based SMA formed at lower scanning speeds exhibited even higher thermal conductivity. This work shows the potential of fabricating high‐performance Cu‐based SMA components by LPBF.This article is protected by copyright. All rights reserved.

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Laser powder bed fusion of a superelastic Cu-Al-Mn shape memory alloy

Cited by 43 publications

References 73 publications

Revisiting Cu-based shape memory alloys: Recent developments and new perspectives

Revisiting Cu-based shape memory alloys: Recent developments and new perspectives

Feedstock preparation, microstructures and mechanical properties for laser-based additive manufacturing of steel matrix composites

Laser Powder Bed Fusion of Cu–Al–Ni–Mn Shape‐Memory Alloy for the Application of Active Heat Sinks: Processability, Microstructures, and Shape‐Memory Effect

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