Using hardness measurement for dislocation densities determination in FSPed metal in order to evaluation of strain rate effect on the tensile behavior

作者：Barmouz Mohsen^*; Abrinia Karen; Khosravi Jahangir

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2013, 559: 917-919.

DOI：10.1016/j.msea.2012.08.086

• Hardness measurement
• Grain boundaries
• Grain refinement
• Dislocations
• Friction stir processing

Hardness indentation size effect led to demonstrate that, multi-pass friction stir processed (FSPed) metal had lower dislocation densities compared to single-pass one. Tensile properties of both specimens were examined in different strain rates and it was indicated that, the lower dislocation densities in multi-pass FSPed metal resulted in more significant alteration in its tensile behavior compared to single-pass FSPed specimen. Yield drop phenomenon also only occurred in highest strain rate of two-pass FSPed metal.

• 出版日期2013-1-1