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http://hdl.handle.net/10362/139234
Título: | In-situ synchrotron X-ray diffraction analysis of the elastic behaviour of martensite and H-phase in a NiTiHf shape memory alloy fabricated by laser powder bed fusion |
Autor: | Shen, Jiajia Zeng, Zhi Nematollahi, Mohammadreza Schell, Norbert Maawad, Emad Vasin, R. N. Safaei, Keyvan Poorganji, Behrang Elahinia, Mohammad Oliveira, João Pedro |
Palavras-chave: | NiTiHf shape memory alloys Synchrotron radiationmartensite H-phase Laser powder bed fusion Additive manufacturing |
Data: | Dez-2021 |
Resumo: | High temperature shape memory alloys of the Ni-Ti-Hf system are potential candidates for aerospace applications where powder bed additive manufacturing technologies are being increasingly used. In this work, a Ti-rich NiTiHf high temperature shape memory alloy powder was processed by laser powder bed fusion. The standard heat treatment of 550 ⁰C for 3 hours was imposed to promote H-phase precipitation. At room temperature, the material has a dual-phase microstructure composed of martensite, the matrix, and H-phase, as a strengthening precipitate. High energy synchrotron X-ray diffraction is used to evaluate, in-situ, the elastic behaviour of the fabricated part. The deformation anisotropy of several (h k l) families of planes of both phases is evidenced. No major texture changes were observed upon macroscopic elastic loading. We illustrate the potential of using high energy synchrotron X-ray diffraction for detailed analyses of minority phases in additively manufactured components. |
Descrição: | UID/00667/2020 CSC NO. 201808320394 2020ZDZX0015 I-20200633 |
Peer review: | yes |
URI: | http://hdl.handle.net/10362/139234 |
DOI: | https://doi.org/10.1016/j.addlet.2021.100003 |
Aparece nas colecções: | Home collection (FCT) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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1_s2.0_S2772369021000037_main.pdf | 3,59 MB | Adobe PDF | Ver/Abrir |
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