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| | I would like to introduce myself to you, I am Andrew and my spouse doesn't like it at all. Mississippi is exactly where his home is. To climb is something I really enjoy performing. Office supervising is exactly where my primary earnings arrives from but I've always wanted my personal company.<br><br>my web site ... free psychic reading ([http://galab-work.cs.pusan.ac.kr/Sol09B/?document_srl=1489804 galab-work.cs.pusan.ac.kr]) |
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| The '''Hollomon–Jaffe parameter''', or '''HP''', describes the effect of a [[heat treatment]] at a [[temperature]] for a certain time.<ref Name="Brooks">{{cite book
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| |title=Principles of the heat treatment of plain carbon and low alloy steels
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| |last=Brooks
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| |first=Charlie
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| |authorlink=Charlie R. Brooks
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| |year=1996
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| |publisher=ASM International
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| |isbn=0871705389
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| |page=158
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| |url=http://books.google.com/books?id=fVIlbCFTodgC&pg=PA158&dq=%22Hollomon-Jaffe+parameter%22&hl=en&ei=MM_STNDEGsOblgeJ4M3vDQ&sa=X&oi=book_result&ct=result&resnum=2&ved=0CCwQ6AEwAQ#v=onepage&q=%22Hollomon-Jaffe%20parameter%22&f=false }}</ref>
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| ==Effect==
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| The 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.
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| ==Formula==
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| In the Hollomon–Jaffe parameter, This exchangeability of time and temperature can be described by the following formula:
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| :<math>H_p = \frac {(273.15 + T)}{1000} \cdot (C + \log(t)) </math>
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| This formula is not consistent concerning the units; the parameters must be entered in a certain manner. ''T'' is in degrees Celsius. The argument of the [[Logarithm|logarithmic function]] has the unit [[hour]]s. ''C'' is a parameter unique to the material used. The Hollomon parameter itself is [[Dimensionless quantity|unitless]] and realistic numeric values vary between 15 and 21.
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| :<math>H_p = T (C + \log(t)) \,</math>
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| where ''T'' is in [[kilokelvin]]s, ''t'' is in hours, and ''C'' is the same as above.
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| ==See also==
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| * [[Zener–Hollomon parameter]]
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| ==References==
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| {{reflist}}
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| {{DEFAULTSORT:Hollomon-Jaffe Parameter}}
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| [[Category:Metal heat treatments]]
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| [[hu:Hollomon–Jaffe-paraméter]]
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