Selective laser melting produced layer-structured NiTi shape memory alloys with high damping properties and Elinvar effect

In this work, two sets of selective laser melting (SLM) process parameters were used alternately to produce a layer-structured NiTi sample. The transformation behavior of the sample shows that austenite transforms gradually into martensite over a wide temperature range (~130K) during cooling. A micr...

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Bibliographic Details
Published inScripta materialia Vol. 146; pp. 246 - 250
Main Authors Wang, Xiebin, Speirs, Mathew, Kustov, Sergey, Vrancken, Bey, Li, Xiaopeng, Kruth, Jean-Pierre, Van Humbeeck, Jan
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 15.03.2018
Subjects
Damping
Elinvar
Functionally graded materials
Selective laser melting
Shape memory alloy
Damping
Selective laser melting
Shape memory alloy
Functionally graded materials
Elinvar
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Summary:In this work, two sets of selective laser melting (SLM) process parameters were used alternately to produce a layer-structured NiTi sample. The transformation behavior of the sample shows that austenite transforms gradually into martensite over a wide temperature range (~130K) during cooling. A microstructure composed of alternating layers of austenite and martensite is observed at room temperature. The sample shows excellent damping performance and the Elinvar effect, which originates from the gradual formation of martensite. This work suggests that SLM could serve as an effective way to directly fabricate functionally graded materials. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2017.11.047