ISSN:
1573-8973
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions 1. In tension of specimens made from solid-phase welded joints of carbon steels, cracks nucleate in defects of the seam (micropores, nonmetallic inclusions), and also in zones of segregation of secondary phases, viz. "white bands" on the interface between layers. 2. From the ramification of the "network" of discovered intergranular delaminations in the zone of coalescence in mechanical tests, their dimensions and area occupied by them we can estimate the quality of coalescence. 3. The existence of sections of cleavage in the zone of coalescence is characteristic of a structure with small dimensions of the interlayer of the secondary phase. An increased cooling rate after deformation of the specimens causes a reduction of the dimensions of the segregating secondary phase, thereby also affecting the mechanism of failure in mechanical tests. 4. When the quality of coalescence improves, the form of failure changes from intergranular to intragranular. The cause of the appearance of cleavage in the fractures is the presence of oriented interlaminar boundaries in the zone of coalescence, and also chemical inhomogeneity in regard to carbon and oxygen.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00693339
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