Journal: Acta Materialia
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Abbreviation
Acta Mater
Publisher
Elsevier
160 results
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Publications 1 - 10 of 160
- Twinning induced spatial stress gradients: Local versus global stress states in hexagonal close-packed materialsItem type: Journal Article
Acta MaterialiaFidder, Herman; Basu, Indranil; De Hosson, Jeff Th.M. (2023)Length scale dependent microstructural heterogeneities serve as effective pathways in engineering materials for providing simultaneous strength-ductility enhancement. In this regard, hexagonal close-packed (hcp) materials that exhibit a combination of slip and multiple twinning modes potentially act as ideal candidates that generate heterogeneous microstructures. However, such an inhomogeneous distribution of crystallographic defects also results in build-up of spatially heterogeneous local stress gradients that can be distinct from globally applied stress state. In particular, stress fields arising at the vicinity of deformation twins and due to their interaction with grain interfaces often act as precursors to damage nucleation in most hcp metals and alloys. Hence, assessment of such local stresses and their overall impact on plasticity becomes necessary in order to understand the relationship between twinning and fracture in hcp materials. The current work utilizes commercially pure titanium (cp-Ti) as a model material to investigate the impact of twinning induced stress gradients on the local mechanical response. By means of correlative multiscale structural characterization and local stress gradient measurements, we establish a definitive relationship between applied stress vis-à-vis local stress on the local plasticity behavior ahead of a {112¯2} compression twin-grain boundary intersection in cp-Ti. Additionally, the role of twin interfacial structure for tension and compression twinning modes are experimentally determined and their corresponding impact on the local stress fields and associated twin migration mechanisms is assessed. - Precipitation hardening of biodegradable Fe-Mn-Pd alloysItem type: Journal Article
Acta MaterialiaMoszner, Frank; Sologubenko, Alla; Schinhammer, Michael; et al. (2011) - In situ SANS study of pore microstructure in YSZ thermal barrier coatingsItem type: Journal Article
Acta MaterialiaStrunz, Pavel; Schumacher, Gerhard; Vassen, Robert.; et al. (2004) - Quantitative phase field simulation of deep cells in directional solidification of an alloyItem type: Journal Article
Acta MaterialiaLan, Chung-Wen; Shih, Chih-Jen; Lee, Min-Hung (2005) - Microstructural studies of crystallization of a Zr-based bulk metallic glassItem type: Journal Article
Acta MaterialiaPekarskaya, E.; Löffler, Jörg F.; Johnson, W.L. (2003) - GrainPaint: A multi-scale diffusion-based generative model for microstructure reconstruction of large-scale objectsItem type: Journal Article
Acta MaterialiaHoffman, Nathan; Diniz, Cashen; Liu, Dehao; et al. (2025)Simulation-based approaches to microstructure generation can suffer from a variety of limitations, such as high memory usage, long computational times, and difficulties in generating complex geometries. Generative machine learning models present a way around these issues, but they have previously been limited by the fixed size of their generation area. We present a new microstructure generation methodology leveraging advances in inpainting using denoising diffusion models to overcome this generation area limitation. We show that microstructures generated with the presented methodology are statistically similar to grain structures generated with a kinetic Monte Carlo simulator, SPPARKS. - Synchrotron X-ray microdiffraction reveals rotational plastic deformation mechanisms in polycrystalline thin filmsItem type: Journal Article
Acta MaterialiaNyilas, Ralph D.; Kobas, Miroslav; Spolenak, Ralph (2009) - Deformation behavior of sintered nanocrystalline silver layersItem type: Journal Article
Acta MaterialiaZabihzadeh, Seyed; Van Petegem, Steven; Duarte, Liliana I.; et al. (2015) - The as-deposited structure of co-sputtered Cu-Ta alloys, studied by X-ray diffraction and molecular dynamics simulationsItem type: Journal Article
Acta MaterialiaMüller, Claudia Manuela; Parviainen, Stefan; Djurabekova, Flyura G.; et al. (2015) - Adaptive phase field simulation of non-isothermal free dendritic growth of a binary alloyItem type: Journal Article
Acta MaterialiaLan, Chungwen; Chang, Yuchen; Shih, Chih-Jen (2003)
Publications 1 - 10 of 160