Výsledky vyhledávání - "A. L. Pilchak"

Akademický článek

Microstructural Characterization of Friction-Stir Processed Ti-6Al-4V

Autor: Sergey Mironov, Yutaka S. Sato, Hiroyuki Kokawa, Satoshi Hirano, Adam L. Pilchak, Sheldon Lee Semiatin

Publikováno v: Metals, Vol 10, Iss 7, p 976 (2020)

The present work was undertaken to shed additional light on the globular-α microstructure produced during FSP of Ti-6Al-4V. To this end, the electron backscatter diffraction (EBSD) technique was employed to characterize the crystallographic aspects

Externí odkaz: https://doaj.org/article/c04fa2d97b544a00a1af273b4b2f35a8

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An Investigation of the Development of Coarse Grains During β Annealing of Hot-Forged Ti-6Al-4V

Autor: S. Srivatsa, S. L. Semiatin, E. J. Payton, Adam L. Pilchak, N. C. Levkulich

Publikováno v: Metallurgical and Materials Transactions A. 52:1353-1367

Process variables contributing to the development of non-uniform, coarse grains during β annealing following subtransus conventional forging of the α/β titanium alloy Ti-6Al-4V were investigated using subscale laboratory experiments and simulation

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e1e3a32bfcf38bcb19e98e0d798a7027
https://doi.org/10.1007/s11661-021-06158-z

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A robust algorithm to calculate parent β grain shapes and orientations from α phase electron backscatter diffraction data in α/β-titanium alloys

Autor: T. D. Berman, Alexander Zaitzeff, John E. Allison, Adam L. Pilchak, Selim Esedoglu

Publikováno v: Scripta Materialia. 191:191-195

This paper presents a new model and open-source algorithm for reconstructing prior β phase orientation and grain shapes from measured α-phase electron backscatter diffraction data in α/β titanium alloys. It is based on the image segmentation mode

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cbd65ef37d86ca1163dacece8248c3d4
https://doi.org/10.1016/j.scriptamat.2020.09.038

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Multiscale modeling of cruciform dwell tests with the uncertainty-quantified parametrically homogenized constitutive model

Autor: Somnath Ghosh, Adam L. Pilchak, Deniz Ozturk, Aaron P. Stebner, G. M. Hommer, Thirupathi Maloth

Publikováno v: Acta Materialia. 200:893-907

This paper presents a novel multiscale approach for analyzing multi-axial stress-strain evolution in Ti-7Al cruciform specimens under dwell loading, through the use of an uncertainty-quantified, parametrically homogenized constitutive model (UQ-PHCM)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3ddb9788bc631e3e599dbb23552689a7
https://doi.org/10.1016/j.actamat.2020.09.037

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An Expanded Martensite Variant Selection Theory Accounting for Transformation Rotations and Applied Stress Fields: Predictions of Variant Clusters in Titanium

Autor: Zach D. Brunson, Aaron P. Stebner, Satish I. Rao, Eric J. Payton, Adam L. Pilchak

Publikováno v: JOM. 72:3594-3607

An expanded strain energy-based criterion for predicting preferred martensite variants and multivariant clusters is developed and verified. Building upon previous inclusion-based formulations that considered only the strain energy of lattice stretche

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::85496ea757caba624db364c237e1150f
https://doi.org/10.1007/s11837-020-04327-w

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Plastic Flow During Hot Working of Ti-7Al

Autor: Ayman A. Salem, N. C. Levkulich, S. L. Semiatin, Adam L. Pilchak

Publikováno v: Metallurgical and Materials Transactions A. 51:4695-4710

Plastic flow during hot working of Ti-7Al with an equiaxed-α (fully-recrystallized) starting microstructure was quantified and interpreted via hot compression testing, metallographic/texture characterization, and internal-state-variable modeling. Is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::65deb853f014ca8fcaa89a00d6c87613
https://doi.org/10.1007/s11661-020-05884-0

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Prediction of relative globularization rates in α + β titanium alloys as a function of initial crystal orientation

Autor: V. M. Miller, Michael Mizak, Benjamin A. Begley, Keith Markham, Adam L. Pilchak

Publikováno v: Journal of Materials Research. 35:1113-1120

The breakdown of the columnar grains and lamellar α + β colony microstructure in two-phase Ti alloys during conversion of ingot to billet is critical to the development of desired combination of mechanical properties. Colony breakdown occurs during

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f3bbbf966b19afecfac599281abd7352
https://doi.org/10.1557/jmr.2020.54

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Transient Plastic Flow and Phase Dissolution During Hot Compression of α/β Titanium Alloys

Autor: N. C. Levkulich, S. L. Semiatin, Jaimie Tiley, Nathalie Bozzolo, C. A. Heck, A. E. Mann, Adam L. Pilchak

Publikováno v: Metallurgical and Materials Transactions A
Metallurgical and Materials Transactions A, Springer Verlag/ASM International, 2020, 51 (5), pp.2291-2305. ⟨10.1007/s11661-020-05673-9⟩

Transients in plastic flow behavior and the kinetics of dynamic dissolution of α particles were established via isothermal, hot compression testing of Ti-6Al-4V (Ti64) and Ti-6Al-2Sn-4Zr-2Mo-0.1Si (Ti6242S). For this purpose, samples were preheated

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8efb27ffb449061f4ed18d45c3519804
https://doi.org/10.1007/s11661-020-05673-9

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