Line profile analysis and rocking curve evaluation of 3D diffraction data reveal a strain softening mechanism

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F22%3A00558299" target="_blank" >RIV/61389005:_____/22:00558299 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/22:10454084

Result on the web

<a href="https://doi.org/10.1016/j.actamat.2022.117993" target="_blank" >https://doi.org/10.1016/j.actamat.2022.117993</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.actamat.2022.117993" target="_blank" >10.1016/j.actamat.2022.117993</a>

Result language

angličtina

Original language name

Line profile analysis and rocking curve evaluation of 3D diffraction data reveal a strain softening mechanism

Original language description

Diffraction patterns from & SIM,100 individual grains of a solutionized and quenched metastable beta-Ti alloy were obtained by high energy synchrotron diffraction during in-situ tensile deformation experiments. The diffraction patterns of select grains were analyzed per an established single-crystal line profile analysis technique to assess the dislocation density evolution on individual slip systems. Further, a new technique to estimate the geometrically necessary dislocation (GND) density from rocking curves is introduced. The results provide a powerful complement to previously published comparisons between measured and crystal plasticity simulated internal elastic strains (and stresses). In particular, they reveal there is no preference for 1/2 < 111 > Burgers vector dislocations to reside on a particular glide plane, since they have similar densities on {1101 and {1121 planes. In addition, an explanation for the observation of strain softening in some of the grains is hypothesized as form of 'plastic buckling'. A select number of strain softening grains exhibit higher lattice curvature (GND density) than other grains, indicating that the grains have 'broken up' into smaller domains which are deforming in distinct ways from one another, and more easily than they would have together. On the other hand, no significant differences in total dislocation density increment were observed, and examination of diffraction data from a larger subset of grains shows no strong correlations between total or GND densities with hardening/softening behavior. The results of this study reveal that GND density does not correlate with higher grain-level stress or more rapid strain hardening response.

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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

Name of the periodical

Acta Materialia

ISSN

1359-6454

e-ISSN

1873-2453

Volume of the periodical

233

Issue of the periodical within the volume

JUL

Country of publishing house

GB - UNITED KINGDOM

Number of pages

15

Pages from-to

117993

UT code for WoS article

000799067500006

EID of the result in the Scopus database

2-s2.0-85129862146