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High‐Temperature Mechanical Behavior of Single‐Crystal FeCrAl Alloy Under In Situ Micropillar Compression

Journal Article · · Advanced Engineering Materials
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  1. School of Materials Engineering Purdue University West Lafayette IN 47907 USA
  2. Center for Integrated Nanotechnologies MPA Division Los Alamos National Laboratory Los Alamos NM 87545 USA
  3. Nebraska Center for Materials and Nanoscience University of Nebraska‐Lincoln Lincoln NE 68583‐0857 USA
  4. School of Materials Engineering Purdue University West Lafayette IN 47907 USA, School of Electrical and Computer Engineering Purdue University West Lafayette IN 47907 USA

FeCrAl cladding is one of the candidate materials for the near‐term accident‐tolerant fuel technologies under development. Research on high‐temperature mechanical behaviors of single‐crystal FeCrAl alloy is rather limited. Previous studies have reported the mechanical property of low‐index orientation in single‐crystal FeCrAl alloy at room temperature. However, the critical resolved shear stress to activate slip systems can be orientation and temperature dependent. Here, single‐crystal grains in a coarse‐grained FeCrAl alloy with different crystallographic orientations are selected to preferentially activate {110}<111> slip systems or {112}<111> slip systems. Micropillars are fabricated in the selected single‐crystal grains and tested at elevated temperatures in situ in a scanning electron microscope. The critical resolved shear stresses of {110}<111> slip systems and {112}<111> slip systems are determined at various temperatures. The critical resolved shear stress shows a temperature dependence and orientation independence. This study provides important insight for understanding the deformation mechanisms of FeCrAl alloys at elevated temperatures.

Sponsoring Organization:
USDOE
OSTI ID:
2438142
Alternate ID(s):
OSTI ID: 2438144
Journal Information:
Advanced Engineering Materials, Journal Name: Advanced Engineering Materials Journal Issue: 21 Vol. 26; ISSN 1438-1656
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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