Abstract

Here, orientation-dependent plasticity in zirconium (Zr)-alloy, which is produced through ultrasonic additive manufacturing (UAM) with subsequent hot-isostatic pressing (HIP), was analyzed by recording electron backscattered diffraction (EBSD) data during in-situ micromechanical testing. Three (0001) plane orientations of a hexagonal close-packed (HCP) structure were analyzed parallel to (1) the rolling direction [X||tensile direction (TD)], (2) the build direction [Z], and (3) the transverse direction [Y]. The analysis revealed that the grains with ~<0001>||TD show twin-dominant plasticity with three variants from {10 $$\overline{1}$$ 2}<$$\overline{1}$$ 011>; minor slipping with ($$10\overline{1}$$ 1)[$$\overline{2}$$ 113], and ($$11\overline{2}$$ 2)[$$\overline{1} \overline{1}$$ 23] pyramidal slip has also been observed. However, grains with orientation ~<0001>⊥TD are mainly sensitive to dislocations assisted plasticity-leading to orientation gradients formation. Furthermore, the neck formation was identified as originating from higher populated micro-crack locations and their association with localized plasticity at defect points in the UAM material. These results demonstrate that minimization of impurities to enable grain growth across prior foil interfaces makes HIP an effective methodology for producing Zr plate, with deformation characteristics expected for conventionally manufactured Zr.

Authors:

Bibhanshu, Nitish  ^[1];

• Search DOE PAGES for author "Bibhanshu, Nitish"
• Search DOE PAGES for ORCID "0000-0001-5686-069X"

Massey, Caleb P. ^[2]; Harp, Jason  ^[2];

• Search DOE PAGES for author "Harp, Jason"
• Search DOE PAGES for ORCID "0000-0002-5345-8440"

Nelson, Andrew T.  ^[2]

• Search DOE PAGES for author "Nelson, Andrew T."
• Search DOE PAGES for ORCID "0000-0002-4071-3502"

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+ Show Author Affiliations

1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
2. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Publication Date:

Sat Jul 08 00:00:00 EDT 2023

Research Org.:

Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:

USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation

OSTI Identifier:

2006952

Grant/Contract Number:  

AC05-00OR22725

Resource Type:

Accepted Manuscript

Journal Name:

Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing

Additional Journal Information:

Journal Volume: 882; Journal Issue: 1; Journal ID: ISSN 0921-5093

Publisher:

Elsevier

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE; In-situ micromechanical testing; Zr; SEM; EBSD; Twinning; Additive manufacturing