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Shape Memory and Superelasticity
Published in: Shape Memory and Superelasticity 3/2023

10-05-2023 | TECHNICAL ARTICLE

Crack Initiation Angle in Single Crystal Shape Memory Alloys

Authors: Fatma Mutlu, Günay Anlaş, Hüseyin Şehitoğlu

Published in: Shape Memory and Superelasticity | Issue 3/2023

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Abstract

In this work, the crack initiation angle from a notch in a single crystal shape memory alloy is discussed in detail. Three edge-notched single crystal CoNiAl specimens are tested under similar conditions to observe the crack initiation from the notch, and crack initiations at angles of 43 ± 1° are seen. The initiation angles are then calculated analytically using Generalized Maximum Tangential Stress (GMTS), and Maximum Energy Release Rate (MERR) criteria; the Strain Energy Density (SED) is plotted around the notch. Single edge-notched specimens are also modeled using ABAQUS. First the specimen is loaded up to austenite to martensitic transformation stress followed by further elastic loading of martensite. The results that are obtained analytically, and using Finite Elements (FE) are compared to the experimental ones, and a good agreement is seen.
previous article Effect of Layered Atomic Ordering on the Magnetic Properties of Fe2Ni-Based Heusler Alloys: Insights from Ab Initio Simulations
next article Geometry of Needle-Like Microstructures in Shape-Memory Alloys
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Metadata
Title
Crack Initiation Angle in Single Crystal Shape Memory Alloys
Authors
Fatma Mutlu
Günay Anlaş
Hüseyin Şehitoğlu
Publication date
10-05-2023
Publisher
Springer US
Published in
Shape Memory and Superelasticity / Issue 3/2023
Print ISSN: 2199-384X
Electronic ISSN: 2199-3858
DOI
https://doi.org/10.1007/s40830-023-00439-9

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