Surface integrity and superelastic response of additively manufactured Nitinol after heat treatment and finish machining

R. Bertolini; S. Bruschi; A. Ghiotti; E. Savio; L. Ceseracciu; I. S. Jawahir

doi:10.1016/j.cirp.2023.04.025

Surface integrity and superelastic response of additively manufactured Nitinol after heat treatment and finish machining

R. Bertolini, S. Bruschi, A. Ghiotti, E. Savio, L. Ceseracciu, I. S. Jawahir

Research output: Contribution to journal › Article › peer-review

Abstract

This paper explores the feasibility of adopting additive manufacturing followed by heat treatment and finish machining to fabricate Nitinol components with enhanced surface integrity and more favourable superelastic characteristics. The most suitable manufacturing approach is demonstrated to achieve these characteristics by establishing appropriate bulk and surface conditioning. New insights are presented on the correlation of process chain parameters and Nitinol superelastic response focusing on the role of the microstructural constituents and surface integrity generated from finish machining with different cooling conditions. The wear behaviour of Nitinol components fabricated by the proposed manufacturing approach is also evaluated to demonstrate bearing applications.

Original language	English
Journal	CIRP Annals - Manufacturing Technology
DOIs	https://doi.org/10.1016/j.cirp.2023.04.025
State	Accepted/In press - 2023

Bibliographical note

Publisher Copyright:
© 2023 CIRP

Keywords

Additive manufacturing
Cryogenic machining
Nitinol

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.cirp.2023.04.025

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abstract = "This paper explores the feasibility of adopting additive manufacturing followed by heat treatment and finish machining to fabricate Nitinol components with enhanced surface integrity and more favourable superelastic characteristics. The most suitable manufacturing approach is demonstrated to achieve these characteristics by establishing appropriate bulk and surface conditioning. New insights are presented on the correlation of process chain parameters and Nitinol superelastic response focusing on the role of the microstructural constituents and surface integrity generated from finish machining with different cooling conditions. The wear behaviour of Nitinol components fabricated by the proposed manufacturing approach is also evaluated to demonstrate bearing applications.",

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AU - Bertolini, R.

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AU - Ghiotti, A.

AU - Savio, E.

AU - Ceseracciu, L.

AU - Jawahir, I. S.

PY - 2023

Y1 - 2023

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AB - This paper explores the feasibility of adopting additive manufacturing followed by heat treatment and finish machining to fabricate Nitinol components with enhanced surface integrity and more favourable superelastic characteristics. The most suitable manufacturing approach is demonstrated to achieve these characteristics by establishing appropriate bulk and surface conditioning. New insights are presented on the correlation of process chain parameters and Nitinol superelastic response focusing on the role of the microstructural constituents and surface integrity generated from finish machining with different cooling conditions. The wear behaviour of Nitinol components fabricated by the proposed manufacturing approach is also evaluated to demonstrate bearing applications.

KW - Additive manufacturing

KW - Cryogenic machining

KW - Nitinol

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Surface integrity and superelastic response of additively manufactured Nitinol after heat treatment and finish machining

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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