期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2022.142691
关键词
Friction stir welding; Nanoindentation; Vickers hardness; Crystallographic texturing; Stainless steel
类别
资金
- US DOE Office of Nuclear En-ergy [DE-NE0008776]
Simulated cracks in 304L stainless steel were repaired using low temperature friction stir welding. Indentation studies were conducted to understand the influence of microstructural features on mechanical properties across the weld and to measure the size of the weld zones quantitatively.
Simulated cracks were repaired in 304L stainless steel using low temperature friction stir welding. Indentation studies were carried out to understand the effect of microstructural features on the mechanical property variation across the weld and to measure the size of the weld zones with a quantitative technique. Microhardness and nanoindentation hardness profiles were constructed on a transverse section across the weld. The data obtained were correlated by extrapolating the nanoindentation hardness to greater depths which showed that the nano-indentation hardness closely reflects the microhardness values throughout the weld. Grain size in the stir zone (SZ) was found to vary with the tool temperature which, in turn, alters the nanoindentation modulus variability and higher tool temperature resulted in widening of the SZ.
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