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Hollomon-Jaffe parameterThe Hollomon-Jaffe parameter, or HP, describes the effect of a heat treatment at a temperature for a certain time. Additional recommended knowledgeEffectThe effect of the heat treatment depends on its temperature and its time. The same effect can be achieved with a low temperature and a long holding time, or with a higher temperature and a short holding time. FormulaIn the Holloman-Jaffe parameter, This exchangability of time and temperature can be described by the following formula: This formula is not consistent concerning the units; the parameters must be entered in a certain manner. The argument of the logarithmic function has the unit minutes. The Hollomon parameter itself is unitless and realistic numeric values vary between 15 and 21. |
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Hollomon-Jaffe_parameter". A list of authors is available in Wikipedia. |