Mechanical properties of the hexagonal HoMnO3 thin films by nanoindentation

Yen, Cheng Yo; Jian, Sheng-Rui; Lai, Yi-Sheng; Yang, Ping; Liao, Ying-Yen; Jang, J.S.C.; Lin, Tjung Han; Juang, Jenh‐Yih

doi:10.1016/j.jallcom.2010.08.109

Cited by 28 publications

(13 citation statements)

References 25 publications

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“…74 Based on the classic indentation fracture mechanics, the fracture toughness K c of elastic-plastic brittle materials is directly related to the indentation load P and the length of the radial cracks at the surface, c 0 . For stress-free materials, the fracture toughness can be determined using the following expression:…”

Section: Indentation Fracture Technique For the Determination Of Resimentioning

confidence: 99%

Measurement of Residual Stresses Using Nanoindentation Method

Zhu

Xu²,

Wang

et al. 2014

Critical Reviews in Solid State and Materials Sciences

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Instrumented indentation, which is also known as nanoindentation or depth-sensing indentation, is increasingly being used to probe the residual stresses of materials including bulk solids, thin films, and coatings. The residual stresses are proved to have significant effects on various nanoindentation parameters such as hardness, loading curve, unloading curve, pile-up amount around indentation, and true contact area. By analyzing these parameters, numerous methods are developed to evaluate the residual stresses of materials in recent years. This article reviews six commonly used models which determine residual stresses from analyzing load-depth curves, as well as indentation fracture technique which is based on the classical fracture mechanics. Emphasis is placed on the principle, application and limitation of each nanoindentation method.

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Section: Indentation Fracture Technique For the Determination Of Resimentioning

confidence: 99%

Measurement of Residual Stresses Using Nanoindentation Method

Zhu

Xu²,

Wang

et al. 2014

Critical Reviews in Solid State and Materials Sciences

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“…During the indentation on brittle materials, cracks may be induced by the impressions. Based on this, the facture toughness could be evaluated [14][15][16]. In this work, we attempted to study the cracking sensitivity of intermetallics in Fe-Nb dissimilar weld metal via nanoindentation tests.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Fracture Toughness of Fe–Nb Dissimilar Welded Joints

Chu

Zhang

Xia

et al. 2021

Metals

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The relation between the microstructure and mechanical properties of the Fe–Nb dissimilar joint were investigated using nanoindentation. The weld metal consists mainly of Fe2Nb, α-Fe + Fe2Nb, Nb (s,s) and Fe7Nb6 phases. Radial cracks initiate from the corners of the impressions on the Fe2Nb phase (~20.5 GPa) when subjected to a peak load of 300 mN, whereas the fine lamellar structures (α-Fe + Fe2Nb) with an average hardness of 6.5 GPa are free from cracks. The calculated fracture toughness of the Fe2Nb intermetallics is 1.41 ± 0.53 MPam1/2. A simplified scenario of weld formation together with the thermal cycle is proposed to elaborate the way local phase determined the mechanical properties.

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“…Nanoindentation has been widely employed as an important tool to study the mechanical characteristics, including the measurement of hardness and elastic modulus [ 1 , 2 , 3 , 4 , 5 , 6 ], creep resistance [ 7 ] and fracture behaviors [ 8 , 9 ] of various nano-scale materials and thin films. The initial segment in the nanoindentation load-displacement curve usually manifests the elastic behavior of the material under test, whereas the onset of plastic deformation is generally associated with a displacement discontinuity, i.e.…”

Section: Introductionmentioning

confidence: 99%

Dislocation Energetics and Pop-Ins in AlN Thin Films by Berkovich Nanoindentation

2013

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Nanoindentation-induced multiple pop-ins were observed in the load-displacement curves when the mechanical responses of AlN films grown on c-plane sapphire substrates were investigated by using Berkovich indenters. No evidence of phase transformation is revealed by cross-sectional transmission electron microscopy (XTEM) and selected area diffraction (SAD) analyses. Instead XTEM observations suggest that these “instabilities” resulted from the sudden nucleation of dislocations propagating along the slip systems lying on the {0001} basal planes and the {10true1¯1} pyramidal planes commonly observed in hexagonal compound semiconductors. Based on this scenario, an energetic estimation of dislocation nucleation is made.

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Mechanical properties of the hexagonal HoMnO3 thin films by nanoindentation

Cited by 28 publications

References 25 publications

Measurement of Residual Stresses Using Nanoindentation Method

Measurement of Residual Stresses Using Nanoindentation Method

Microstructure and Fracture Toughness of Fe–Nb Dissimilar Welded Joints

Dislocation Energetics and Pop-Ins in AlN Thin Films by Berkovich Nanoindentation

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