1. Effect of microstructure heterogeneity on the mechanical properties of friction stir welded reduced activation ferritic/martensitic steel
- Author
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Wenshen Tang, Xinqi Yang, Napat Vajragupta, Shengli Li, Aleksander Kostka, Hao Wang, Abhishek Biswas, and Alexander Hartmaier
- Subjects
Materials science ,Friction stir welding ,Mechanical Engineering ,Metals and Alloys ,Welding ,Condensed Matter Physics ,Microstructure ,Reduced activation ferritic/martensitic steel ,Indentation hardness ,Martensitic microstructure ,law.invention ,Electron backscatter diffraction orientation analysis ,Mechanics of Materials ,law ,Martensite ,Geometrically necessary dislocations ,General Materials Science ,Austenite reconstruction ,Dislocation ,Composite material ,Electron backscatter diffraction - 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.
- Published
- 2022