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Welding Journal Final 2019.98.005.pdf (11.13 MB)

Cross-weld creep performance in grade 91 steel: Macro-based assessment

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journal contribution
posted on 2019-06-12, 09:49 authored by John A. Siefert, Jonathan D. Parker, Rachel ThomsonRachel Thomson
Meaningful characterization of the microstructure in metallurgically complex steels is complicated by the diversity of thermal cycles experienced by multipass fusion welds. To overcome the problems of relevant documentation, it is necessary to balance information from macro-, micro-, and nano-evaluation with appropriate analysis. This paper presents details regarding recommended approaches that optimize this characterization. Initially, specific procedures relevant to macroanalysis, including hardness mapping and calculation of the peak temperature through the width of the heat-affected zone (HAZ), are described. Then, assessment of the distribution of creep damage in feature-type, cross-weld creep tests using laser microscopy is detailed. Using these methods, the extent of damage through the HAZ was compared to the local reduction in the HAZ hardness and to the calculated peak temperatures in the HAZ. The implications of these findings are discussed with respect to damage, deformation, and sample geometry.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

Welding Journal -New York-

Volume

March 2019

Pages

63-s - 77-s (15)

Citation

SIEFERT, J.A., PARKER, J.D. and THOMSON, R.C., 2019. Cross-weld creep performance in grade 91 steel: Macro-based assessment. Welding Journal, March 2019, pp. 63s - 77s.

Publisher

American Welding Society

Version

  • VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

2018-10-19

Publication date

2019-03-31

Notes

This paper was accepted for publication in the journal Welding Journal and the definitive published version is available at https://doi.org/10.29391/2019.98.005

ISSN

0043-2296

Language

  • en

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