by National Aeronautics and Space Administration; available from the Clearinghouse for Federal Scientific and Technical Information, Springfield, Va. in [Washington .
Written in English
|Statement||by J. G. Kura, V. D. Barth, and H. O. McIntire.|
|Series||NASA SP5086, NASA SP ;, 5086.|
|Contributions||Barth, Vincent David, 1910- joint author., McIntire, H. O., joint author., United States. George C. Marshall Space Flight Center, Huntsville, Ala. Manufacturing Engineering Laboratory., Battelle Memorial Institute.|
|LC Classifications||TS233 .K78|
|The Physical Object|
|Pagination||viii, 42 p.|
|Number of Pages||42|
|LC Control Number||68061530|
Precipitation hardening, also called age hardening or particle hardening, is a heat treatment technique used to increase the yield strength of malleable materials, including most structural alloys of aluminium, magnesium, nickel, titanium, and some steels and stainless superalloys, it is known to cause yield strength anomaly providing excellent high-temperature strength. SAO/NASA Astrophysics Data System (ADS) Title: Shaping of Precipitation-Hardening Stainless Steels by Casting and Powder-Metallurgy. NASA SP Authors: Kura, J. G. Corrosion resistance of precipitation hardening stainless steels is generally superior to that of the standard hardenable martensitic stainless steels, but is not quite as good as chromium-nickel Type Corrosion resistance of the PH stainless steels depends, to some extent, on the heat treated condition. Ramesh Singh, in Applied Welding Engineering (Second Edition), Properties and Application of Precipitation Hardening Steels. Precipitation hardening (PH) stainless steels can develop high strength with simple heat treatments. They have good corrosion and oxidation resistance without the loss of toughness and ductility that is normally associated with high-strength materials.
Popular since the s, these alloys have been continuously improved, and applications based on them have expanded in concert. The Alnicos are brittle and therefore shaped by casting or powder metallurgy methods. Because they are precipitation hardening alloys, the first step involves solution treatment at °C. Upon cooling to °C a two. for wrought stainless steels. Another letter and number system, that of the Alloy Casting Dairy, Food and Environmental Sanitation - JULY Institute, applied to the cast grades. These early systems divided stainless steel alloys into groups according to . Stainless Steels for Design Engineers provides engineers and designers with a valuable guide on stainless steels. Basic metallurgy and identification of constituents of stainless steel, the effects of alloying elements, and corrosion are explained. Stainless Steel Alloys Most precipitation-hardening stainless steels contain a titanium and/or aluminum addition that forms the fine precipitates responsible for the increase in strength. For example, PH has about a 1% aluminum addition, and alloy A .
A. Lawley's 87 research works with 1, citations and 1, reads, including: Diffusion behavior and microstructural transformations in pm steels containing silicon. Progress in the understanding of corrosion and corrosion resistance properties of sintered stainless steels has lead to new applications that benefit from net shape processing and more efficient material utilization. The text, extensive graphics, and tabular summaries provide a comprehensive reference to obtain good corrosion resistance properties of sintered stainless steels with careful. When order volume exceeds a few dozen, process economics dictate a near-net shape manufacturing process with little after-work necessary. Many engineers and buyers gravitate to die casting, but there are good reasons for considering powder metal -- especially as new uses, materials, and design possibilities are unlocked thanks to evolving technology and understanding of powder metallurgy (PM). The holding time at temperature was 3 hrs followed by cooling at 10 o C/min. Blaine et al  have determined that sintering of precipitation hardening stainless steels is enhanced in pure.