Principles For Understanding Heat Treating Materials: The Ellingham Diagram (Part 1)

Principles for Understanding Heat Treating Materials: The Ellingham Diagram (Part 1)

by Mike Powers, F.A.S.M.   In the previous article of this series, we investigated the wetting of solids by liquids in terms of the Young Equation.  Now we turn to one of the most utilitarian tools in thermodynamics and materials processing, the Ellingham diagram.  I feel it is only fair to start off with a brief discussion about the man behind the diagram.  Harry Ellingham was a British physical chemist, best known for his Ellingham diagrams, which summarize the empirically…

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Principles For Understanding Heat Treating Materials: The Young Equation

Principles for Understanding Heat Treating Materials: The Young Equation

Mike Powers, F.A.S.M. In the first two articles of this series we explored basic definitions and concepts associated with thermodynamic systems and investigated the Laws of Thermodynamics and their implications for process spontaneity, process irreversibility and the importance of the Gibbs free energy.  Now we move on to understanding the principles of the Young Equation and how it describes wetting of solids by liquids. I would like to start off with a brief eulogy to Thomas Young (Fig. 1), a…

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Principles For Understanding Heat Treating Materials (Part 2)

Principles for Understanding Heat Treating Materials (Part 2)

by Mike Powers, F.A.S.M. In part 1 of this article we explored the definition of a thermodynamic system, the transfer of matter and energy across system boundaries, what is meant by system equilibrium, the definition of state functions, and the modes of energy transfer as expressed by work and heat.  In part 2 we will investigate the Laws of Thermodynamics and their implications for process spontaneity, process irreversibility and the importance of the Gibbs free energy. For our purposes, we…

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Principles For Understanding Heat Treating Materials

Principles For Understanding Heat Treating Materials

by Mike Powers, F.A.S.M. This is the first in a series of articles addressing traditional and contemporary methods for heat treating and brazing of advanced engineering materials.  The objective is to emphasize the basic thermodynamic principles underlying practical applications in materials processing.  To that end, I will begin with a presentation of some important thermodynamic concepts. Traditionally, the branch of physical science known as chemical thermodynamics is generally viewed as distinctly dry and boring.  However, I am not one who…

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Nevada Heat Treating – A Proud Member Of The Metal Treating Institute

Nevada Heat Treating – A Proud Member of the Metal Treating Institute

The Metal Treating Institute (MTI) is a trade association of owners and managers of companies that provide heat treating services. MTI offers national meetings twice a year and local meetings several times a year where professional speakers discuss all aspects that affect heat treating. This includes technology, taxes, regulations, and liability situations.
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Rich Penrose Of Nevada Heat Treating / California Brazing Receives MTI Award Of Industry Merit

Rich Penrose of Nevada Heat Treating / California Brazing Receives MTI Award of Industry Merit

Rich Penrose, President of Nevada Heat Treating / California Brazing, received the MTI Award of Industry Merit at the Metal Treating Institute's (MTI) Fall National Meeting in Nashville, TN.   The award is given... "In recognition of current/ongoing commitment to the betterment of the commercial heat treating industry with one or more significant accomplishments." During the award presentation it was noted that Rich... "Contributed technically to hundreds of government, aerospace, military, and defense milestone events for United States, including the…

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California Brazing Announces That It Has Been Awarded Nadcap Merit Status for Heat Treating & Brazing

California Brazing has held Nadcap accreditation since 2011. Having demonstrated their ongoing commitment to quality by satisfying customer requirements and industry specifications, the Nadcap Task Group has determined that California Brazing has earned special recognition. This means that, instead of having their next Nadcap audit in twelve months, California Brazing has been granted an accreditation that lasts 18 months.
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Nevada Heat Treating, Inc. Receives Nadcap Reaccreditation for Heat Treating

Nadcap recognizes Nevada Heat Treating for its commitment to continual improvement in aerospace quality. Nevada Heat Treating announces that it has received Nadcap reaccreditation for Heat Treating. "Being Nadcap accredited means that you are compliant with and have been audited to the most stringent quality standards in our industry and are capable of processing aerospace components." ...
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Predicting Size Change from Heat Treatment

While a precise forecast of a part's size change during heat treating cannot be expected, by considering potential factors, a heat treater can provide a reasonable estimate that can help the shop prepare for final machining operations....
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