Determination of single-crystal elasticity constants of the beta phase in a multiphase tungsten thin film using impulse excitation technique, X-ray diffraction and micro-mechanical modeling

Slim, Mohamed Fares; Alhussein, Akram; Zgheib, Elia; François, Manuel

doi:10.1016/j.actamat.2019.06.035

Cited by 12 publications

(5 citation statements)

References 51 publications

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“…Initially, Dölle and Hauk [145] introduced the so-called stress factors to account for the texture using the crystallographic orientation distribution function (ODF). Several authors (e.g., Slim et al [146], Brakman et al [147], Welzel et al [148][149][150], Gnäupel-Herold et al [151]) proposed alternative approaches to embed the ODF in the determination of the DECS. More recently Mishurova et al [40] have shown, that the use of Wu's tensor [152] is equivalent to using Kröner s approach.…”

Section: Methodsmentioning

confidence: 99%

Diffraction-Based Residual Stress Characterization in Laser Additive Manufacturing of Metals

Schröder

Evans

Mishurova

et al. 2021

Metals

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Laser-based additive manufacturing methods allow the production of complex metal structures within a single manufacturing step. However, the localized heat input and the layer-wise manufacturing manner give rise to large thermal gradients. Therefore, large internal stress (IS) during the process (and consequently residual stress (RS) at the end of production) is generated within the parts. This IS or RS can either lead to distortion or cracking during fabrication or in-service part failure, respectively. With this in view, the knowledge on the magnitude and spatial distribution of RS is important to develop strategies for its mitigation. Specifically, diffraction-based methods allow the spatial resolved determination of RS in a non-destructive fashion. In this review, common diffraction-based methods to determine RS in laser-based additive manufactured parts are presented. In fact, the unique microstructures and textures associated to laser-based additive manufacturing processes pose metrological challenges. Based on the literature review, it is recommended to (a) use mechanically relaxed samples measured in several orientations as appropriate strain-free lattice spacing, instead of powder, (b) consider that an appropriate grain-interaction model to calculate diffraction-elastic constants is both material- and texture-dependent and may differ from the conventionally manufactured variant. Further metrological challenges are critically reviewed and future demands in this research field are discussed.

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Section: Methodsmentioning

confidence: 99%

Diffraction-Based Residual Stress Characterization in Laser Additive Manufacturing of Metals

Schröder

Evans

Mishurova

et al. 2021

Metals

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“…The 2θ theoretical values of the TiN face centered cubic phase are 37.01 • , 42.96 • and 62.21 • , respectively, for {111}, {200} and {220} crystalline plane families. The step measurement on the sampling angles was defined using the equal area projection method [17]. The pole figures are determined using Diffrac-Texture software and are represented in stereographic projection.…”

Section: Characterization Techniquesmentioning

confidence: 99%

“…It has great potential to be used for the protection of steels and tools [6]. In addition, nitrogen is a lubricated solid element with a low friction coefficient and wear rate that has also been used in severe industrial applications [15][16][17][18][19][20][21]. However, in the literature there has been insufficient investigation into the combination of mechanical, tribological and hydrophobic properties of sputtered TiN films (hardness, adhesion and wear resistance) and the texture (predominate plane and preferential orientation) [22].…”

Section: Introductionmentioning

confidence: 99%

Relationship between structure, surface topography and tribo-mechanical behavior of Ti-N thin films elaborated at different N2 flow rates

et al. 2021

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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“…14 From mix-W films, Slim et al determined C 11 of monocrystal b-W to be 350.3 6 45.6 GPa. 30 We attribute these discrepancies to the specimen difference: we used 40-nm and 70-nm pure b-W films; on the other hand, Slim et al used 2-3 lm mix-W films.…”

mentioning

confidence: 97%

“…However, elastic constants-which are the most essential mechanical property-of b-W remain unclear. Slim et al extracted monocrystal elastic constants of b-W from 2.1-lm a-and b-W films; 30 however, elastic constants of single-phase b-W have not been measured. Elastic constants reflect the intrinsic bond strength between atoms and correspond to the curvature of the interatomic potential.…”

mentioning

confidence: 99%

Elastic constants of beta tungsten thin films studied by picosecond ultrasonics and density functional theory

Nagakubo

Lee

Ogi

et al. 2020

Applied Physics Letters

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Tungsten thin films are used for various applications and sometimes exhibit an A15 structure (b-W). They have some superior properties in comparison to the bcc structure (a-W), such as a higher superconducting transition temperature and larger spin Hall angle. However, elastic constants of b-W are unclear, which restricts mechanical applications and reliable density-functional-theory calculations. In this study, we synthesized a-W, b-W, and mixed-phase W films and determined their elastic constants by picosecond ultrasonics. We also calculated the elastic constants based on density functional theory and reveal that b-W has a larger elastic anisotropy and smaller shear modulus. Our calculation further indicates a stable stacking faulted b-W, which leads to a monoclinic structure.

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Determination of single-crystal elasticity constants of the beta phase in a multiphase tungsten thin film using impulse excitation technique, X-ray diffraction and micro-mechanical modeling

Cited by 12 publications

References 51 publications

Diffraction-Based Residual Stress Characterization in Laser Additive Manufacturing of Metals

Diffraction-Based Residual Stress Characterization in Laser Additive Manufacturing of Metals

Relationship between structure, surface topography and tribo-mechanical behavior of Ti-N thin films elaborated at different N2 flow rates

Elastic constants of beta tungsten thin films studied by picosecond ultrasonics and density functional theory

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