Heat Treatment of Metals and Alloys
A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Mechanical Engineering".
Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 2143
Special Issue Editor
2. Department of Mechanical Engineering Science, University of Johannesburg, Ackland Park, Kingsway Campus, Johannesburg 2092, South Africa
Interests: laser additive manufacturing; direct energy deposition; alloy development; in situ alloying; in situ heat treatment; pre-heating; post-heating
Special Issue Information
Dear Colleagues,
Traditional manufacturing routes such as casting have seen the development of fully fledged strategies for carrying out heat treatment post-manufacturing. Moreover, available alloys have standard heat treatment phase diagrams. The advent of additive manufacturing, however, whether by laser or electron melting, presents a difficult scenario for achieving desirable alloys, and their post-heat-treatment strategies do not follow those developed and commercialized based on traditional manufacturing routes. Additive manufacturing has introduced the possibility of manufacturing non-conventional alloys and printing of difficult alloys into finished products. To achieve such sound products, there are limitations on how to handle available metals and their alloys, with the most important limitation being in the manufacturing of traditional alloys using AM machines; additionally, it has become clear that post-heat-treatment strategies cannot be used as standard given the history of heating that any printed structure must undergo. Moreover, printed structures are under stress during printing, and if not cured or healed, the produced structure will fail prematurely. This is a significant difficulty that must be resolved given the qualification standards that are required especially for parts flying in airplanes and serving as high-temperature structures for energy applications. This Special Issue will look at the best strategies for additive manufacturing Alloy 17-4Ph, Inconel 718, and Titanium Aluminides Ti4822, and their heat treatment (both in situ and post-heat-treatment) in achieving a desirable or superior microstructure for applications in energy and aerostructures.
Dr. Monnamme T. Tlotleng
Guest Editor
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Keywords
- additive manufacturing
- alloy 17-4Ph
- direct energy deposition
- Inconel 718
- in situ heating
- in situ alloying
- metals and alloys
- microstructural transformation
- pre-heating
- post-heat treatment
- stress measurements and titanium aluminides Ti4822
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