Effect of microstructure heterogeneity on the mechanical properties of friction stir welded reduced activation ferritic/martensitic steel

Shengli Li, Napat Vajragupta, Abhishek Biswas, Wenshen Tang, Hao Wang, Aleksander Kostka, Xinqi Yang (Corresponding Author), Alexander Hartmaier

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

The microhardness distribution in the different zones of a friction stir welded reduced activation ferritic/martensitic steel has been investigated and correlated to the hierarchical martensitic microstructure in the respective zones, characterized by electron backscatter diffraction orientation analysis. It is found that the variation of prior austenite grain size, packet size, and block width in different subzones is influenced by the peak temperature and effective strain rate during the friction stir welding process. The distribution of the microhardness correlates directly with the geometrically necessary dislocation density observed in the different zones.

Original languageEnglish
Article number114306
Number of pages6
JournalScripta Materialia
Volume207
Early online date27 Sep 2021
DOIs
Publication statusPublished - 15 Jan 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • Austenite reconstruction
  • Electron backscatter diffraction orientation analysis
  • Friction stir welding
  • Geometrically necessary dislocations
  • Reduced activation ferritic/martensitic steel

Fingerprint

Dive into the research topics of 'Effect of microstructure heterogeneity on the mechanical properties of friction stir welded reduced activation ferritic/martensitic steel'. Together they form a unique fingerprint.

Cite this