BM	Base material
CDRX	Continuous dynamic recrystallisation
CoF	Coefficient of friction
CRM	Crittical raw materials
ECA	Edge chipping area
FBJ	Friction bit joining
FSS	Flat friction stir scribe
FSW	Friction stir welding
FSSW	Friction stir spot welding
HAZ	Heat affected zone
LEDS	Low energy dislocation structure
RSW	Resistance spot welding
SAM	Scanning acoustic microscopy
SCA	Stabile contact area
SEM	Scanning electron microscopy
SPT	Small punch test
SZ	Stir zone
TMAZ	Thermo-mechanicaly affected zone
WFI	Weld faing interface
Nomenclature
F	Axial load
n	Rotational speed
h	Penetration depth
td	Dwell time
τ	Shear stress
σn	Nominal stress
T	Torque
FN	Axial Load
r(t)	Rool contact radius
Fr	Radial load chaused bz clamping system
Fec	Load chausing edge clamping
Fec - shear	Shear load chausing edge cliping
Ffriction	Friction load
Fnormal	Predominant axial load
Fshear	Shear load
E	Joint efficienty
Rm(weld)	Weld strength
Rm(BM)	Base material strength
Fm(weld)	Rapture load of the welds
Fm(BM)	Rapture load of the base material
d	Bottom diameter of the stir zone
D	Top diameter of the stir zone