Superalloy | Wikipedia audio article
Channel: wikipedia tts
Date: 06/05/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Superalloy


00:00:59 1 Chemical development
00:05:54 2 Metallurgy of superalloys
00:06:04 2.1 Ni-based superalloy phases
00:08:59 2.2 Co-based superalloy phases
00:10:24 2.3 Fe-based superalloy phases
00:11:38 2.4 Microstructure of Fe-based superalloys
00:15:05 2.5 Microstructure of superalloys
00:20:36 3 Single-crystal superalloys
00:23:15 4 Oxidation in superalloys
00:26:03 5 Superalloy processing
00:26:58 5.1 Casting and forging
00:27:52 5.1.1 Investment casting
00:28:38 5.1.2 Directional solidification
00:29:16 5.1.3 Single crystal growth
00:29:39 5.2 Powder metallurgy
00:30:25 5.2.1 Sintering and hot isostatic pressing
00:31:04 5.2.2 Additive manufacturing
00:31:55 6 Coating of superalloys
00:32:23 6.1 Different types of coating
00:33:35 6.1.1 Thermal barrier coatings
00:35:27 6.1.2 Bond coat
00:38:23 6.2 Process methods of coating
00:39:03 6.2.1 Pack cementation process
00:40:43 6.2.2 Thermal spraying
00:41:21 6.2.3 Plasma spraying
00:42:00 6.2.4 Gas phase coating
00:42:43 6.3 Failure mechanisms in thermal barrier coating systems
00:44:03 7 Applications
00:47:31 8 Research and development of new superalloys
00:49:49 9 See also



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SUMMARY
=======
A superalloy, or high-performance alloy, is an alloy that exhibits several key characteristics: excellent mechanical strength, resistance to thermal creep deformation,  good surface stability, and resistance to corrosion or oxidation. The crystal structure is typically face-centered cubic austenitic. Examples of such alloys are Hastelloy, Inconel, Waspaloy, Rene alloys, Incoloy, MP98T, TMS alloys, and CMSX single crystal alloys.
Superalloy development has relied heavily on both chemical and process innovations.  Superalloys develop high temperature strength through solid solution strengthening. An important strengthening mechanism is precipitation strengthening which forms secondary phase precipitates such as gamma prime and carbides. Oxidation or corrosion resistance is provided by elements such as aluminium and chromium.
The primary application for such alloys is in turbine engines, both aerospace and marine.