MPa	Mega Pascal
rpm	revolution per minute
Mm/min	millimeter per minute
FSP	Friction Stir Processing
FSW	Friction Stir Welding
SEM	Scanning Electron Microscopy
ON	Optical Microscopy
kN	kilo-Newton
te	Time of Exposure
ac	cross sectional area
∆W	reduction in specimen weight
ρ	mass density
NaCl	sodium chloride
ASTM	American Society for Testing and Materials
G	Grams
UTM	Universal Testing Machine
CNC	Computer Numerical Control
ZrO2	zirconia (or) zirconium dioxide
TIG	Tungsten Inert Gas
AMC	aluminum metal matrix composite
TiB2	titanium diboride
BN	boron nitride
Al0.3CoCrCu0.3FeNi	a kind of high-entropy alloy