Influence of Quenchant Hydrodynamics and Boiling Phase Incipient Temperature Shifts on Residual Stress Formation

Quench heat treatments are used in metallurgical applications to alter material mechanical properties such as hardness and strength. Although these conventional heat treatments have been used for many decades, specific influences of material properties and heat transfer conditions during quenching a...

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Bibliographic Details
Published in:Heat transfer engineering 2009-06, Vol.30 (7), p.564-573
Main Authors: Vorster, Willem J. J., Van Der Watt, Morne W., Venter, Andrew M., Oliver, Edward C., Prakash, D. G. Leo, Korsunsky, Alexander M.
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: structure, mechanical and thermal properties
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Fluid dynamics
Fluid mechanics
Fundamental areas of phenomenology (including applications)
General theory
Hardening. Tempering
Heat transfer
Heat treating
Heat treatment
Liquid-vapor transitions
Metallurgy
Metals. Metallurgy
Physics
Production techniques
Quenching
Residual stress
Solid mechanics
Specific phase transitions
Stress state
Structural and continuum mechanics
Studies
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Summary:Quench heat treatments are used in metallurgical applications to alter material mechanical properties such as hardness and strength. Although these conventional heat treatments have been used for many decades, specific influences of material properties and heat transfer conditions during quenching are not very well understood. In particular, predictions based on steady-state boiling heat transfer coefficients disagree with observations, leading to the use of average uniform heat transfer coefficient applied over entire component surfaces as a rule of thumb, with adjustments made for particular processes and components. This paper investigates the effects of multiphase boiling heat transfer and transitional nucleate boiling regimes on the final residual stress states within components. The results of this study show that correct representation of heat transfer conditions provides significant improvements over the current quench modeling techniques, ultimately allowing production of engineering components with superior mechanical properties, reduced distortion, and well-controlled beneficial residual stress states.
ISSN:0145-7632
1521-0537
DOI:10.1080/01457630802594937