This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Hot isostatic pressing" – news · newspapers · books · scholar · JSTOR(January 2017) (Learn how and when to remove this message)
Isostatically pressed nickel alloys
Hot isostatic pressing (HIP) is a manufacturing process, used to reduce the porosity of metals and increase the density of many ceramic materials. This improves the material's mechanical properties and workability.
The process can be used to produce waste form classes. Calcined radioactive waste (waste with additives) is packed into a thin walled metal canister. The adsorbed gases are removed with high heat and the remaining material compressed to full density using argon gas during the heat cycle. This process can shrink steel canisters to minimize space in disposal containers and during transport. It was invented in the 1950s at the Battelle Memorial Institute[1] and has been used to prepare nuclear fuel for submarines since the 1960s. It is used to prepare inactive ceramics as well, and the Idaho National Laboratory has validated it for the consolidation of radioactive ceramic waste forms. ANSTO (Australian Nuclear Science and Technology Organisation) is using HIP as part of a process to immobilize waste radionuclides from molybdenum-99 production.[2]
The HIP process subjects a component to both elevated temperature and isostatic gas pressure in a high pressure containment vessel. The pressurizing gas most widely used is argon. An inert gas is used so that the material does not chemically react. The choice of metal can minimize negative effects of chemical reactions. Nickel, stainless or mild steel, or other metals can be chosen depending on the desired redox conditions. The chamber is heated, causing the pressure inside the vessel to increase. Many systems use associated gas pumping to achieve the necessary pressure level. Pressure is applied to the material from all directions (hence the term "isostatic").
For processing castings, metal powders can also be turned to compact solids by this method, the inert gas is applied between 7,350 psi (50.7 MPa) and 45,000 psi (310 MPa), with 15,000 psi (100 MPa) being most common. Process soak temperatures range from 900 °F (482 °C) for aluminium castings to 2,400 °F (1,320 °C) for nickel-based superalloys. When castings are treated with HIP, the simultaneous application of heat and pressure eliminates internal voids and microporosity through a combination of plastic deformation, creep, and diffusion bonding; this process improves fatigue resistance of the component. Primary applications are the reduction of microshrinkage, the consolidation of powder metals, ceramic composites and metal cladding. Hot isostatic pressing is thus also used as part of a sintering (powder metallurgy) process and for fabrication of metal matrix composites,[3]
often being used for postprocessing in additive manufacturing.[4]
^"The Evolution of HIP" (PDF). ASME.org. April 2, 1985.
^"Hot Isostatic Pressing". ScienceDirect.
^Atkinson, Dr H. V.; Davies, S. (2000-12-01). "Fundamental aspects of hot isostatic pressing: An overview". Metallurgical and Materials Transactions A. 31 (12): 2981–3000. Bibcode:2000MMTA...31.2981A. doi:10.1007/s11661-000-0078-2. ISSN 1073-5623. S2CID 137660703.
^Simpson, Timothy W. (2018-05-05), "After the build is done why do the bills keep coming?", Modern Machine Shop, retrieved 2018-05-18.
and 27 Related for: Hot isostatic pressing information
Hotisostaticpressing (HIP) is a manufacturing process, used to reduce the porosity of metals and increase the density of many ceramic materials. This...
method is heated and then hot forged to full density, resulting in practically as-wrought properties. Hotisostaticpressing (HIP): Here the powder, normally...
between them. In hotisostaticpressing, a sintered material is placed in a pressure vessel and compressed from all directions (isostatically) in an inert...
Hotpressing, a powder metallurgy process Hotisostaticpressing, a manufacturing process Plant pressing, a botanical collection technique Pressing plant...
pre-alloying and then consolidated by metal injection moulding, hotisostaticpressing, direct powder rolling or laser engineered net shaping. The traditional...
Bodycote plc is a supplier of heat treatments, metal joining, hotisostaticpressing and coatings services. Based in Macclesfield, United Kingdom, it is...
temperature will induce the reduction or annihilation of pores. Hotisostaticpressing (HIP) is a manufacturing process, used to reduce the porosity of...
metallurgy, spark plasma sintering, chemical vapor deposition, hotisostaticpressing, and thermoplastic routes. A more flexible manufacturing alternative...
nanoparticle. Later methods involved sintering (pressure and heat, .e.g hotisostaticpressing). The material is so small that it has basically no flaws. Larger...
carbide particles with the binder is referred to as sintering or hotisostaticpressing (HIP). During this process, the material is heated until the binder...
Plating Thermal spraying Powder metallurgy Compaction plus sintering Hotisostaticpressing Metal injection moulding Spray forming Plastics (see also Rapid...
from agglomerated aluminum oxide, sintered and fused (such as by hotisostaticpressing) in an inert atmosphere, yielding a transparent but slightly porous...
temperature capability of turbine blades. Further processing methods like hotisostaticpressing improved the alloys used for turbine blades and increased turbine...
compaction, degassing, and thermo-mechanical treatment (possibly via hotisostaticpressing (HIP) or extrusion) Foil diffusion bonding: Layers of metal foil...
different post-processing methods such as cyanoacrylate coatings, or by hotisostaticpressing. 3D printing Desktop manufacturing Digital fabricator Direct digital...
temperatures used in conventional consolidation processes such as hotisostaticpressing, allowing desirable characteristics such as nanocrystalline grain...
been produced by sinter/HIP, hotpressing, and hot press/HIP operations, and it has been shown that the use of a hotisostatic press can improve its optical...
produce a powder. The powder is then compressed in a process known as hotisostaticpressing (HIP), where it is compressed within a bellows-like stainless steel...
conductive powder in a graphite die. SPS is faster than conventional hotisostaticpressing, where the heat is provided by external heating elements. The light...
production with the aid of cold isostaticpressing in the 1940s; metallizing, tape casting and hotisostaticpressing in the 1950s; and multilayer ceramic...
bulk molding technology. A variant used for 3D shapes is called hotisostaticpressing. To allow efficient stacking of product in the furnace during sintering...
forming Cold forming Semi-solid metal casting Photochemical machining Hotisostaticpressing "Steel Castings | What is Near Net Shape Manufacturing?". www.ferralloy...
materials are combined in a ball mill and ground to a fine powder. A hotisostaticpressing (HIP) process is then applied to simultaneously compress and sinter...
filled into capsules directly in order to avoid contamination. With hotisostaticpressing (HIP), the powder is consolidated to 100% density. The advantage...
a black-coloured or a designed blade made through an additional hotisostaticpressing step, which increases toughness. Unlike a steel blade that benefits...
Global Information
