Stress raisers and fracture in shape memory alloys: review and ongoing challenges

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F21%3APU140666" target="_blank" >RIV/00216305:26210/21:PU140666 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/22:00567867

Result on the web

<a href="https://doi.org/10.1080/10408436.2021.1896475" target="_blank" >https://doi.org/10.1080/10408436.2021.1896475</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/10408436.2021.1896475" target="_blank" >10.1080/10408436.2021.1896475</a>

Result language

angličtina

Original language name

Stress raisers and fracture in shape memory alloys: review and ongoing challenges

Original language description

Shape memory alloys (SMAs) are able to recover large inelastic strains due to their thermal-/stress-induced phase transformation between austenite and martensite. Stress raisers can either initially exist in SMA components as the manufacturing-induced micro-defects, or may nucleate upon monotonic/cyclic loading, for instance, due to decohesion of the second particles or local cyclic plastic deformations. Furthermore, from a physical point of view, there is a problem why SMAs can withstand tens of millions of cycles if they deform elastically but only thousands of cycles if the martensitic transformation is involved in their cyclic deformation under the stress, even if the martensitic transformation is reversible. One of the possibilities is the nucleation and propagation of cracks from the stress raisers since the evolution of the transformation and local mechanical gradients are completely different at the high-stress zones at stress raisers than that being experienced within the elastic bulk. Thus, the successful implementation of SMA elements into engineering applications requires understanding and analysis of the role of the stress raisers in fracture and fatigue crack growth properties of shape memory alloys. The linear and non-linear Fracture Mechanics theories, commonly used to describe the fracture processes in typical structural alloys, need to be enhanced to capture the complex deformation mechanisms characterizing SMAs. In the present paper, first, the latest progress made in experimental, numerical, and theoretical analyses on the role of the stress raisers in the fracture parameters of SMAs are reviewed and discussed under both pure mechanical and thermomechanical loading conditions. Then, the state-of-arts in fatigue crack growth are addressed. In the end, summary and future topics are outlined.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES

ISSN

1040-8436

e-ISSN

1547-6561

Volume of the periodical

neuveden

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

59

Pages from-to

1896475-1896475

UT code for WoS article

000648478300001

EID of the result in the Scopus database

2-s2.0-85105864073