Measuring Ti-7Al slip system strengths at elevated temperature using high-energy X-ray diffraction

Darren C. Pagan; Joel V. Bernier; Darren Dale; J. Y.Peter Ko; Todd J. Turner; Basil Blank; Paul A. Shade

doi:10.1016/j.scriptamat.2017.08.029

Measuring Ti-7Al slip system strengths at elevated temperature using high-energy X-ray diffraction

Darren C. Pagan, Joel V. Bernier, Darren Dale, J. Y.Peter Ko, Todd J. Turner, Basil Blank, Paul A. Shade

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

58 Scopus citations

Abstract

Full stress tensors of over four hundred individual grains in a titanium alloy specimen (Ti-7Al) are tracked during continuous uniaxial deformation through the elasto-plastic transition at 355°C. The experiment is facilitated by a unique radiative heating furnace and load frame designed for in-situ high-energy X-ray diffraction measurements. Average strengths of multiple slip system families are calculated directly from the ensemble grain stress data. Results show that elevated temperature lowers the strength of basal slip systems relative to prismatic slip systems, reduces the degree of flow softening due to precipitate shearing, and decreases the first-order pyramidal slip system work-hardening rate.

Original language	English (US)
Pages (from-to)	96-100
Number of pages	5
Journal	Scripta Materialia
Volume	142
DOIs	https://doi.org/10.1016/j.scriptamat.2017.08.029
State	Published - Jan 1 2018

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2017.08.029

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title = "Measuring Ti-7Al slip system strengths at elevated temperature using high-energy X-ray diffraction",

abstract = "Full stress tensors of over four hundred individual grains in a titanium alloy specimen (Ti-7Al) are tracked during continuous uniaxial deformation through the elasto-plastic transition at 355°C. The experiment is facilitated by a unique radiative heating furnace and load frame designed for in-situ high-energy X-ray diffraction measurements. Average strengths of multiple slip system families are calculated directly from the ensemble grain stress data. Results show that elevated temperature lowers the strength of basal slip systems relative to prismatic slip systems, reduces the degree of flow softening due to precipitate shearing, and decreases the first-order pyramidal slip system work-hardening rate.",

author = "Pagan, {Darren C.} and Bernier, {Joel V.} and Darren Dale and Ko, {J. Y.Peter} and Turner, {Todd J.} and Basil Blank and Shade, {Paul A.}",

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doi = "10.1016/j.scriptamat.2017.08.029",

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T1 - Measuring Ti-7Al slip system strengths at elevated temperature using high-energy X-ray diffraction

AU - Pagan, Darren C.

AU - Bernier, Joel V.

AU - Dale, Darren

AU - Ko, J. Y.Peter

AU - Turner, Todd J.

AU - Blank, Basil

AU - Shade, Paul A.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Full stress tensors of over four hundred individual grains in a titanium alloy specimen (Ti-7Al) are tracked during continuous uniaxial deformation through the elasto-plastic transition at 355°C. The experiment is facilitated by a unique radiative heating furnace and load frame designed for in-situ high-energy X-ray diffraction measurements. Average strengths of multiple slip system families are calculated directly from the ensemble grain stress data. Results show that elevated temperature lowers the strength of basal slip systems relative to prismatic slip systems, reduces the degree of flow softening due to precipitate shearing, and decreases the first-order pyramidal slip system work-hardening rate.

AB - Full stress tensors of over four hundred individual grains in a titanium alloy specimen (Ti-7Al) are tracked during continuous uniaxial deformation through the elasto-plastic transition at 355°C. The experiment is facilitated by a unique radiative heating furnace and load frame designed for in-situ high-energy X-ray diffraction measurements. Average strengths of multiple slip system families are calculated directly from the ensemble grain stress data. Results show that elevated temperature lowers the strength of basal slip systems relative to prismatic slip systems, reduces the degree of flow softening due to precipitate shearing, and decreases the first-order pyramidal slip system work-hardening rate.

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JO - Scripta Materialia

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Measuring Ti-7Al slip system strengths at elevated temperature using high-energy X-ray diffraction

Abstract

All Science Journal Classification (ASJC) codes

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