Influence of ageing stress on yield point phenomenon in very low carbon steel

Authors: Duval, M.; Dickson, J. I.

Source: Metal Science, Volume 13, Number 9, September 1979 , pp. 523-529(7)

Buy & download fulltext article:

Price: $15.00 plus tax (Refund Policy)

Abstract:

Plots of yield drop versus ageing stress vary from curves presenting a minimum at an intermediate stress close to the internal stress to curves presenting a maximum near this stress. The ageing kinetics can best be treated by assuming an equation of the form, ??/?f=A+Btⁿ. The constant A can be directly measured at low temperature and represents the contribution of dislocation-dislocation interactions to the yield drop. The contribution from solute strainageing includes tendencies to increase the yield point with ageing stress, and, in combination with dislocation mobility or dislocation rearrangement effects, to cause the maximum close to the internal stress. The time exponent n is of the order of 2/3 for all ageing stresses. The activation energies are similar for ageing at the flow stress and at zero stress and agree with values previously reported for the two stages of ageing.

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/030634579790438246

Publication date: 1979-09-01

More about this publication?

In 1985 Metal Science was incorporated into Material Science and Technology: click here to see issues of Materials Science and Technology from 1985 to present. The archive also includes the complete run of Metals Technology (1974–84): Click here to see these issues.
Terms & Conditions
ingentaconnect is not responsible for the content or availability of external websites