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Metallurgical Transactions

, Volume 1, Issue 1, pp 85–92 | Cite as

The effect of quench-aging on inhomogeneous yielding of steels with very low interstitial solute content

  • R. E. Hook
Article
  • 113 Downloads

Abstract

The response of the initial yielding behavior to quench-aging was studied for two steels with low interstitial levels, (\(\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{C} = 0.001\),\(\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{N} = 0.0003\)) and (\(\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{C} = 0.001\),\(\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{N} = 0.0025\)), and a typical rimmed steel. Mechanical properties were correlated with the structure as observed by transmission electron microscopy. The effect of quenching temperature, over the range 200° to 700°C, on the degree of suppression of inhomogeneous yielding was measured. Inhomogeneous yielding suppression occurs because of the introduction of mobile dislocations, particularly grain boundary dislocations. The effect of aging time and temperature, over the range 100° to 700°C, on the return to inhomogeneous yielding of samples quenched from 700°C was measured. Inhomogeneous yielding is only partially restored at low aging temperatures and is a result of interstitial locking of dislocations. Full recovery of inhomogeneous yielding occurs only at higher temperatures and is ascribed to dislocation annihilation, particularly of grain boundary dislocations. The aging response of quenched samples is compared to that of samples in which mobile dislocations were introduced by deformation.

Keywords

Metallurgical Transaction Aging Temperature Metallurgical Transaction Volume High Dislocation Density Mobile Dislocation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© The Minerals, Metals & Materials Society - ASM International - The Materials Information Society 1970

Authors and Affiliations

  • R. E. Hook
    • 1
  1. 1.Research CenterArmco Steel CorporationMiddletown

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