Ap	Plastic area under the load-displacement curve, N-m
a	Crack length, mm
B	Specimen thickness, mm
bo	Initial unbroken ligaments, mm
d	Load point displacement, mm
Dw	Diameter of tungsten particle, µm
E	Elastic modulus, GPa
Je	Elastic component of J, kJ/m2
Jp	Plastic component of J, kJ/m2
Jm	Measured total J = Je + Jp at maximum load, kJ/m2
KIm	Measured elastic fracture toughness at maximum load = √[JeE/(1−ν2)], MPa√m
KJm	Measured elastic–plastic fracture toughness at maximum load, MPa√m
P	Load, N
Pm	Maximum load, N
Po	General yield limit load, N
S	Span, mm
σfl, σo	Flow stress, MPa
σu	Ultimate strength, MPa
σy	Yield stress, MPa
ε	Tensile elongation, %
ν	Poisson’s ratio
3PB	Three-point bend specimen
AN	Annealed
AS	As-sintered
ASDEX	Axially symmetric divertor experiment
ASTM	American society for testing and materials
DP	Ductile phase
DR	Ductile rupture
EBSD	Electron backscatter diffraction
EDM	Electrical discharge machining
EDS	Energy dispersive spectroscopy
IPF	Inverse pole figure
LPS	Liquid-phase sintering
MW/m2	Megawatt per meter square
RT	Room temperature
SEM	Scanning electron microscopy
W	Tungsten
WC	Tungsten particle cleavage
WD	Tungsten-DP decohesion
WW	Tungsten particle–particle fracture
WHA	Tungsten heavy alloy