Abstract
Investigations of the fractures of specimens of VT3-1 and VT8 titanium alloys and AVT and D1T aluminum alloys under steadt and nonsteady loading conditions indicate that in the near-threshold area and in the case of partial stoppage of a crack after overloading the processes of transverse (K /SUB III/ ) slip play a significant role in failure. The authors consider a plan of deformation of a material in the elastic area associated with loading of the specimen in compression and tension at a distance from the crack tip and in a crosspice between the microtunnels. It was concluded that the formation of spherical particles must be related to microtunneling of a fatigue crack and rupture of the crosspices between the microtunnels in rotational plastic deformation of the materials, ''nondulizing'', fragmentation of the particles with heating, and subsequent rolling of the particles between the free surfaces of the crack edges.
Published Version
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