creep behavior of hot isostatically pressed graphite -

The Effect of Carbide Morphologies on Elevated Temperature Tensile and Fatigue Behavior

Graphite powder, boron powder, and CrN powder in the appropriate amounts were wrapped in Ni-foil and added to the Prior to the age heat treatments, one batch of bars was hot isostatically pressed (HIPed). This process involves the application of hydrostatic

Creep behavior of Fe‐bearing olivine under hydrous

The samples were isostatically hot pressed in a gas‐medium apparatus at T = 1200 C and P = 300 MPa for 1 h to obtain dense, hydrous, polycrystalline olivine. After hot pressing, a 0.5 mm thick slice of each sample containing an oriented single crystal was obtained for analysis of the starting microstructure of the aggregate and water content of the olivine crystal.

Creep behavior of Fe‐bearing olivine under hydrous

The samples were isostatically hot pressed in a gas‐medium apparatus at T = 1200 C and P = 300 MPa for 1 h to obtain dense, hydrous, polycrystalline olivine. After hot pressing, a 0.5 mm thick slice of each sample containing an oriented single crystal was obtained for analysis of the starting microstructure of the aggregate and water content of the olivine crystal.

The Metallurgical Aspects of Hot Isostatically Pressed Superalloy Castings

THE METALLURGICAL ASPECTS OF HOT ISOSTATICALLY PRESSED SUPERALLOY CASTINGS K. C. Antony Stellite Division, Cabot Corporation J. F. Radavich Purdue University The effects of HIP and post-HIP heat treatment on the

Assessment of service induced microstructural damage and

Once a rejuvenation cycle is designed, the above-mentioned relationships can then be used to analyze the extent of the rejuvenation of microstructure and creep properties in reheat-treated or hot isostatically pressed service exposed turbine blades.

NASA/ADS

Starting materials were hot-isostatically pressed fine-grained glass- powders of anorthite (An) and diopside (Di). Two kinds of samples were fabricated: homogeneous mixtures of 50vol% An and Di and layered composites composed of 2-3 alternating layers of An and Di, each 1.5-3 mm thick.

Creep and toughness of cryomilled NiAl containing Cr

In comparison to the as-consolidated matrices, hot isostatically pressed Cr-modified materials did not demonstrate any significant improvement in toughness. Hot extruded NiAl–AlN + 10.5Cr, however, possessed a toughness twice that determined for the base NiAl–AlN alloy.

I Creep Behavior of Tungsten Fiber Reinforced Niobium Metal

or hot isostatically pressed (HIP), producing a fully densified consolidated structure with negligible fiber/matrix interfacial reaction (Figure 5).Composites panels can be fabricated with a wide range of fiber volume I fractions and angle plies using this technique. In addition, tubing is easily

High temperature deformation behavior of hot isostatically

2010/2/15The hot deformation behavior of hot isostatically pressed (HIPd) P/M superalloy FGH4096 has been characterized by isothermal compression testing in the temperature range of 1050–1140 C and strain rate range of 0.002–1.0 s −1.The apparent activation energy of

Creep behavior of hot isostatically pressed graphite

1971/5/1CREEP BEHAVIOR OF HOT ISOSTATICALLY PRESSED GRAPHITE 343 oriented graphite (ATJ). Figures 2 and 3 show the stress and temperature depend- ences, respectively, of the creep rates. Sequential microscopy revealed no differ- ences of the creep deformation modes for the same material in the hot-isostatic pressed and the unpressed states.

Hot compressive deformation behavior of a new hot

2011/4/1The hot compressive deformation behavior of a new hot isostatically pressed Ni–Cr–Co based powder metallurgy (P/M) superalloy was studied in the temperature range of 950–1150 C and strain rate range of 0.0003–1 s −1 using Gleeble-1500 thermal simulator.

High temperature mechanical performance of a hot

article{osti_226431, title = {High temperature mechanical performance of a hot isostatically pressed silicon nitride}, author = {Wereszczak, A A and Ferber, M K and Jenkins, M G and Lin, C K.J.}, abstractNote = {Silicon nitride ceramics are an attractive material of choice for designers and manufacturers of advanced gas turbine engine components for many reasons.

High Temperature Creep Behavior of High Purity Hot

Abstract The high-temperature compressive creep behavior of different hot-pressed silicon nitride ceramics, without any additives, with very small amounts of alumina/yttria additives and with silicon carbide platelet reinforcement, is investigated with respect to

Rheology of synthetic anorthitediopside aggregates: Implications for ductile shear

hot isostatically pressed for 5 hours in a gas-medium Paterson-type apparatus at a confining pressure of 300 MPa. Densification of the glass powders was allowed for 30 min at 1123 K. Temperature was raised to 1373 K and 1423 K at a rate of 20 K min 1 for as is and predried

Finding the fracture toughness characteristics of graphite

Graphite Fracture Toughness Plane Strain Graphite Material Toughness Characteristic These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

The Creep Behavior of Additively Manufactured Inconel

Creep tests of additively manufactured (AM) Inconel 625, both hot isostatically pressed (HIPed) and non‐HIPed, are performed at various stresses between 65 and 658 MPa at 650–800 C. The creep behavior of AM samples are compared with that of (conventional) wrought alloys.

Microstructure, Tensile, and Creep Behavior of Boron

5B ingot was then hot isostatically pressed (''hipped'') for 4 hours at a pressure of 172 MPa and temperature of 900 C. No subsequent thermomechanical processing was performed on this alloy. An identical supertransus heat treatment was performed on this

THE INFLUENCE OF PARTICLES ON THE RHEOLOGICAL BEHAVIOR

subsequently isostatically hot pressed into fully dense creep specimens at a confining pressure P=20 MPa and The red data appear to show dislocation creep behavior, with no indication of GBS creep at low stresses. Figure 3 – SEM micrograph of a

Effect of Cyclic Loading on the Creep Performance of

Tension–tension cyclic fatigue tests (triangular waveform, σ max = 100 MPa, R = 0.1) were conducted on hot isostatically pressed (HIPed) silicon nitride at frequencies spanning several orders of magnitude (5.6 10 −6 to 0.1 Hz or 10 −3 MPa/s to 18 MPa/s) at 1370 C in air. MPa/s to 18 MPa/s) at 1370 C in air.

Understanding the Role of Hot Isostatic Pressing

article{osti_1209206, title = {Understanding the Role of Hot Isostatic Pressing Parameters on the Microstructural Evolution of Ti-6Al-4V and Inconel 718 Fabricated by Electron Beam Melting}, author = {Peter, William H. and Nandwana, Peeyush and Kirka, Michael M. and Dehoff, Ryan R. and Sames, William and Erdman, III, Donald L. and Eklund, Anders and Howard, Ron}, abstractNote = {In this

Densification Modeling of Titanium Alloy Powder during Hot

Science of Sintering, 43 (2011) 247-260*) Corresponding author: forge54l63 doi: 10.2298/SOS1103247X UDK 622.785;546.82/.83 Densification Modeling of Titanium Alloy Powder during Hot Isostatic Pressing Y.Xue1, 2,*), L.H.Lang1, G.L.Bu1, L.Li3 1 School of Mechanical Engineering and Automation, Beihang University, 100191

Comparison of the Microstructure, Tensile, and Creep Behavior

Comparison of the Microstructure, Tensile, and Creep Behavior for Ti-22Al-26Nb (At. Pct) and Ti-22Al-26Nb-5B (At. Pct) hot isostatic pressed microstructures are presented in Figure 2. Large boride needles, up to 158-lm long and up to 22-lm wide, were

Effects of fine porosity on the fatigue behavior of a

Hot-isostatically-pressed powder-metallurgy Astroloy was obtained which contained 1.4 pct, fine porosity at the grain boundaries produced by argon entering the powder container during pressing. The pores averaged about 2μ,m diam and 20 μ m spacing. This material was tested at 650 C in fatigue, creep-fatigue, tension, and stress-rupture and the results compared with previous data on sound

Creep Behavior of Tungsten/Niobium and Tungsten/Niobium

The creep behavior and microstructural stab niobium and niobium-1% zirconium was determ lity of tungsten ned at and hot isostatically pressed to produce unidirectionally fiber oriented composite panels. Testing Stress rupture tests were conducted onK. A

Comparison of the Microstructure, Tensile, and Creep Behavior

Comparison of the Microstructure, Tensile, and Creep Behavior for Ti-22Al-26Nb (At. Pct) and Ti-22Al-26Nb-5B (At. Pct) hot isostatic pressed microstructures are presented in Figure 2. Large boride needles, up to 158-lm long and up to 22-lm wide, were

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