Laser Powder Bed Fusion of Defect-Free NiTi Shape Memory Alloy Parts with Superior Tensile Superelasticity

Xue, Lei; Atli, K.C.; Zhang, C.; Hite, N.; Srivastava, Abhinav; Leff, Asher C.; Wilson, Adam A.; Sharar, Darin J.; Elwany, Alaa; Arróyave, Raymundo; Караман, И.

doi:10.1016/j.actamat.2022.117781

Cited by 133 publications

(23 citation statements)

References 64 publications

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“…According to the XRD results, the B19′ phase layer (i.e., the black area in Figure 5 a) and the B2 phase layer correspond to the HE region and LE regions, respectively. A strong <100> B2 //BD fiber texture is revealed in the LE region ( Figure 5 c), which has also been reported previously [ 35 , 49 , 50 , 51 , 52 ]. The development of the strong texture is mainly due to the epitaxial grain growth along the maximum temperature gradient, which is normally parallel to the BD [ 53 , 54 , 55 ].…”

Section: Resultssupporting

confidence: 88%

“…Recently, the fabrication of NiTi SMAs by additive manufacturing (AM) has been frequently addressed [ 26 , 27 , 28 , 29 , 30 , 31 ], due to its ability to fabricate geometrically complex NiTi structures, which are quite challenging to fabricate via conventional approaches (e.g., casting, machining). Among the AM technologies, laser powder bed fusion (L-PBF) has attracted much attention [ 32 , 33 , 34 , 35 , 36 , 37 ] due to the fact that L-PBF fabricated parts normally have a higher dimensional accuracy and better surface finish. Moreover, L-PBF also shows a great potential to act as a metallurgical method to modify the microstructure and phase transformation temperatures of NiTi alloys.…”

Section: Introductionmentioning

confidence: 99%

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Structure, Martensitic Transformation, and Damping Properties of Functionally Graded NiTi Shape Memory Alloys Fabricated by Laser Powder Bed Fusion

Jiang

et al. 2022

Materials

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Besides the unique shape memory effect and superelasticity, NiTi alloys also show excellent damping properties. However, the high damping effect is highly temperature-dependent, and only exists during cooling or heating over the temperature range where martensitic transformation occurs. As a result, expanding the temperature range of martensite transformation is an effective approach to widen the working temperature window with high damping performance. In this work, layer-structured functionally graded NiTi alloys were produced by laser powder bed fusion (L-PBF) alternating two or three sets of process parameters. The transformation behavior shows that austenite transforms gradually into martensite over a wide temperature range during cooling, and multiple transformation peaks are observed. A microstructure composed of alternating layers of B2/B19′ phases is obtained at room temperature. The functionally graded sample shows high damping performance over a wide temperature range of up to 70 K, which originates from the gradual formation of the martensite phase during cooling. This work proves the potential of L-PBF to create NiTi alloys with high damping properties over a wide temperature range for damping applications.

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Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Structure, Martensitic Transformation, and Damping Properties of Functionally Graded NiTi Shape Memory Alloys Fabricated by Laser Powder Bed Fusion

Jiang

et al. 2022

Materials

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“…Recent AM studies have also explored the fabrication of functional SMA components with little to no postprocessing requirements. 210,211 The predictive design and assessment of SMAs through the application of data-driven techniques such as machine learning and artificial intelligence is also steadily gaining momentum in recent years. 81,[212][213][214] The complete understanding of the non-linear nature of the phase transformation seen in SMA still requires comprehensive research and experimentation.…”

Section: Discussionmentioning

confidence: 99%

The role of NiTi shape memory alloys in quality of life improvement through medical advancements: A comprehensive review

Nair

Radhika

2022

Proc Inst Mech Eng H

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The significance of advanced smart materials in recent technological research and advancement is apparent from its extensive use in present day devices and instruments. Of the various smart materials in use today, the fascinating category of shape memory alloys (SMAs) is equipped with the ability to return to a previously memorized shape under certain thermomechanical or magnetic stimuli. The unique property of shape memory effect and superelasticity displayed by these materials along with good biocompatibility and corrosion resistance make them ideal for biomedical applications. The various applications of SMAs in surgical instruments, surgical implants, and assistive and rehabilitative devices have significant effect on the day to day life of people in the present age. Majority of these biomedical devices belong to the orthodontic, orthopedic, or surgical fields. Other remarkable applications of SMAs such as in the production of prostheses and orthoses designed through the biomimetic approach are also highly influential in improving the quality of life. The present paper provides an overview of the various properties of shape memory alloys and their applications in the biomedical field over the years, that have had a significant impact on the realm of medical science.

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“…A large columnar grain was obtained of AM fabricated NiTi alloy during laser processing which is attributed to its unique thermal history. Xue et al [5] studied the mechanical properties of AM-fabricated NiTi parts, obtaining excellent superelasticity. A strong preferential texture for as-printed NiTi parts was detected through crystallographic texture analysis, as shown in Figure 2.…”

Section: Superelasticity and Strain Recovery Of Additively Manufactur...mentioning

confidence: 99%

“…Excellent superelastic properties were exhibited when the Ni4Ti3 precipitates remain coherent with the B2 matrix. In recent years, many scholars fabricated NiTi alloy samples with superplastic using additive manufacturing [5]. With progressive need, the wear performance is very significant in various engineering and medical application.…”

Section: Introductionmentioning

confidence: 99%

A review on the superelasticity and tribological properties of NiTi shape memory alloys fabricated by additive manufacturing

Shi

et al. 2023

Fourth International Conference on Optoelectronic Science and Materials (ICOSM 2022)

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NiTi shape memory alloys (SMAs) were utilized in electronics, medicine and aerospace, etc. One difficult point is the solid-state phase transformation of NiTi alloy during machining operations. Additive manufacturing offers a promising solution to this dilemma, which proves a new way for complex structure NiTi alloy. In this paper, we briefly introduce the research progress and status of additive manufacture (AM)-fabricated NiTi alloy at home and abroad. The phase transformation behavior was analyzed by varying AM parameters. Afterward, the previously reported superelasticity of as-built NiTi alloys in compressive and tensile stress states was summarized. The final section summarizes the main findings of tribological properties of NiTi alloys and outlines the trend for future work.

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Laser Powder Bed Fusion of Defect-Free NiTi Shape Memory Alloy Parts with Superior Tensile Superelasticity

Cited by 133 publications

References 64 publications

Structure, Martensitic Transformation, and Damping Properties of Functionally Graded NiTi Shape Memory Alloys Fabricated by Laser Powder Bed Fusion

Structure, Martensitic Transformation, and Damping Properties of Functionally Graded NiTi Shape Memory Alloys Fabricated by Laser Powder Bed Fusion

The role of NiTi shape memory alloys in quality of life improvement through medical advancements: A comprehensive review

A review on the superelasticity and tribological properties of NiTi shape memory alloys fabricated by additive manufacturing

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