Principles For Understanding Heat Treating Materials: Brazing (Part 2)

Principles for Understanding Heat Treating Materials: Brazing (Part 2)

Mike Powers, F.A.S.M The previous article in this series, Brazing (Part 1), explored the thermodynamic basis for the brazing process including the concept of wetting, the influence of capillary action, the effect of surface roughness and the import of interfacial reactions on the resulting braze joint.  In this article we will consider some of the important braze alloy systems and their areas of application, along with a review of brazing techniques, fluxes and braze joint design. Aluminum Based Braze Alloys…

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Nevada Heat Treating Now Offering Aerospace Accredited Aluminum Heat Treating

Nevada Heat Treating Now Offering Aerospace Accredited Aluminum Heat Treating

Carson City, NV / April 27, 2018 – As an industry leader of expert heat treating products and services, Nevada Heat Treating (NHT) now offers Aerospace Accredited Aluminum Heat Treating. Taking into consideration many variables, the addition of this innovative, drop bottom furnace is used to treat aerospace and commercial jobs to the latest AMS Aluminum heat treating specifications.     Since Aluminum requires rigid heat control, preciseness is essential. NHT prides itself with providing exceptional heat control resulting in…

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Principles For Understanding Heat Treating Materials: Brazing (Part 1)

Principles for Understanding Heat Treating Materials: Brazing (Part 1)

Mike Powers, F.A.S.M The process of brazing involves the use of a molten filler metal to wet the mating surfaces of a joint by capillary action, with or without a fluxing agent, leading to the formation of metallurgical bonds between the filler and respective components.  The reactions which occur between the molten filler and surfaces of the solid components result in solutionization, which is erosion of the solid phase by the molten filler alloy.  However, this solutionization reaction is localized…

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Quality Assurance Through Nadcap Accreditation Is The Key To Precision And Value

Quality Assurance Through Nadcap Accreditation is the Key to Precision and Value

 Getting vendor approval from companies such as Boeing, Lockheed Martin, and Honeywell Aerospace involves a rigorous review of Nevada Heat Treating’s (NHT) plant, equipment and personnel. Designing and manufacturing jet engines and other sophisticated equipment requires exacting standards and a dedication to quality that will never be compromised. Because of this, NHT strictly adheres to rigorous Nadcap standards. Nadcap is a 3rd party industry-managed quality assessment program that streamlines the accreditation process for material testing, heat treating, chemical processing, welding…

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Principles For Understanding Heat Treating Materials: Age Hardening

Principles for Understanding Heat Treating Materials: Age Hardening

Mike Powers, F.A.S.M.   Until now, the articles in this series have dealt primarily with the thermodynamic principles and basis for materials processing as applies to heat treating materials.  In this article we will delve into the practical application of age hardening, a phase transition in materials science formally referred to as precipitation hardening. Background The technique of age hardening evolved from the original observations of the German metallurgist Alfred Wilm in the early 1900s.  Wilm conducted a series of…

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The Benefits Of Working With A Nadcap-Approved Heat Treating Company

The Benefits of Working with a Nadcap-Approved Heat Treating Company

The National Aerospace and Defense Contractors Accreditation Program (formerly known as NADCAP) is a global cooperative accreditation program, and is the gold standard in the heat treating industry. It allows companies such as Nevada Heat Treating (NHT) to continuously perform and maintain a certified quality manufacturing system. Nadcap is a nationally-recognized industry-managed quality assessment program that streamlines the accreditation process for material testing, heat treating, chemical processing, welding and other similar services. In the past, aerospace prime contractors such as…

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Principles For Understanding Heat Treating Materials: The Ellingham Diagram (Part 2)

Principles for Understanding Heat Treating Materials: The Ellingham Diagram (Part 2)

by Mike Powers, F.A.S.M. Previously, I introduced the fundamental precepts that define the construction of the Ellingham diagram, which is based on the Gibbs free energy at standard state conditions (ΔGo) for a metal oxidation reaction.  Now we move on to a more detailed look at how the Ellingham diagram can be utilized in practical situations. Practical Applications of the Ellingham Diagram Figure 1 is a modern version of the Ellingham diagram, which was graciously provided by the late, great…

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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: Thermodynamics (Part 2)

Principles for Understanding Heat Treating Materials: Thermodynamics (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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