By means of fractal analysis,the fractal dimension with relation to the impact toughness,im-pact fracture characteristics and mierostructures of steel under low
The dependence of composition varied,especially C,Si,Cr,Cu and Co in four amorphousalloy systems Fe<sub>80-x</sub>Cr<sub>x</sub>Si<sub>5</sub>B<sub>15</sub>.Fe<
The time-dependent fatigue and its micromechanism of superalloy GH169 at 650℃ have beenstudied.Under the same stress and duration,its cyclic life in Ar is shor