|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Nano/Micro-mechanics and Length-scale Phenomena
||J-42: Investigating Microstructural Features of 304L Stainless Steel Friction-stir Weld with Indentation Methods
||Michael Maughan, Nicolene van Rooyen, Madhumanti Bhattacharyya, Indrajit Charit
|On-Site Speaker (Planned)
Indentation investigations were conducted on a 304L stainless steel friction-stir weld to understand the effect that microstructural features have on the hardness and property variation within the weld and to measure the size of the microstructural zones with a quantitative technique. Microhardness has traditionally been used for this purpose. In this work, both microindentation and nanoindentation hardness profiles were constructed on a transverse section across the weld and were correlated by extrapolating the nanoindentation hardness to deeper depths. The extrapolated hardness determined by nanoindentation closely reflects the microhardness values throughout the weld. It was found that larger grain sizes increase the nanoindentation modulus variability and texture changes can be detected by quantifying this variability. Nanoindentation was also found to give better sensitivity to weld-zone width measurements and is preferred over microhardness mapping for typical friction-stir welds.
||Mechanical Properties, Joining, Nanotechnology