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Properties creep rupture

Hua] Tensile, creep rupture tests Yield strength, creep properties (creep rupture lifetime, grain size, ductility)... [Pg.76]

Mechanical Properties Mechanical properties of wide interest include creep, rupture, short-time strengths, and various forms of ductihty, as well as resistance to impact and fatigue stresses. Creep strength and stress rupture are usually of greatest interest to designers of stationary equipment such as vessels and furnaces. [Pg.2423]

Metals Successful applications of metals in high-temperature process service depend on an appreciation of certain engineering factors. The important alloys for service up to I,I00°C (2,000°F) are shown in Table 28-35. Among the most important properties are creep, rupture, and short-time strengths (see Figs. 28-23 and 28-24). Creep relates initially applied stress to rate of plastic flow. Stress... [Pg.2464]

It was concluded that 1.5Ti-3.0Al should be considered the most suitable alloy for ECC flue gas expander rotors. A 1,400-mm diameter expander rotor disk was manufactured using this alloy. Test specimens removed from the disk rim showed that the disk had equivalent tensile properties at both room and elevated temperatures, and the same creep rupture strength as that of AISI 685. [Pg.242]

Metals Successful applications of metals in high-temperature process service depend on an appreciation of certain engineering factors. Among the most important properties are creep, rupture,... [Pg.46]

Creep-rupture is measured using the same methods as creep except that the tests are continued until the specimen ruptures. Gripping and specimen alignment become increasingly important if rupture is to be seen as a material property independent of the... [Pg.74]

Mechanical properties of plastics can be determined by short, single-point quality control tests and longer, generally multipoint or multiple condition procedures that relate to fundamental polymer properties. Single-point tests include tensile, compressive, flexural, shear, and impact properties of plastics creep, heat aging, creep rupture, and environmental stress-cracking tests usually result in multipoint curves or tables for comparison of the original response to post-exposure response. [Pg.153]

Creep, creep rupture, and stress relaxation tests are multiple-point tests requiring long periods of time (1000 h min) to generate useful data these are standard tests for determining more fundamental polymer properties (202,203). Data for these tests are generated under several... [Pg.153]

Chromium is the most effective addition to improve the resistance of steels to corrosion and oxidation ar elevated temperatures, and Ihe chromium—molybdenum steels are an important class of alloys for use in steam power plants, petroleum refineries, and chemical-process equipment. The chromium content in these steels varies from 0.5 to Ill s. As a group, the low carbon chromium—molybdenum steels huve similar creep—rupture strengths, regardless of the chromium content, hut corrosion and oxidation resistance increase progressively vvith chromium content. Most of the chromium — molybdenum steels are used in the annealed or in the normalised and tempered condition some ol the modified grades have better properties in the quench and tempered condition. [Pg.775]

Ohji T (1994) Tensile Creep Rupture And Subcritical Crack Growth of Silicon Nitride. In Hoffmann MJ, Petzow G (eds) Tailoring of Mechanical Properties of Si3N4 Ceramics. Kluwer Academic Publishers, Netherlands, p 339... [Pg.160]

Flow within molds in processes such as IM and resin transfer molding (RTM), or through dies in the extrusion process, can orient the molecules of the resin as well as short or long fibers. This orientation can result in the designed properties desired or, if not properly processed, can result in inferior properties which may become evident in the form of reduced resistance to crazing, low impact strength, lowered creep rupture strength, etc. [Pg.469]

For desulfurizers, coking, and catalytic reforming units, many of the pressure vessels operating with metal temperatures of 700 to 900°F are constructed, from carbon-V2 Mo or IV4 Cr-V2 Mo alloy steels. These steels have marked creep-rupture strength properties over carbon steel. For example, compare the design stress value of 15,000 psi for IV4 Cr-V2 Mo steel at 900°F with the 6,500 psi value for carbon steel at the corresponding temperature. [Pg.289]

The material chosen for the IHX and die steam reformer of the Japanese HTTR is HASTELLOY XR. Corrosion tests and long-term creep tests in helium atmosphere in the temperature range 800 - 1000 C have been conducted reaching 50,000 hours. No significant degradation in creep properties was observed even after carburization. Creep rupture was found to be caused by nucleation, growth, and link-up of grain boundary cavities [26]. [Pg.29]

Textron s SCS-6 SiC fiber was ineluded in Table 3-1 primarily because if has excellenf room-temperature strength and creep-rupture resistance. It is currently made in monofilament form, but multifilament tow fabrication is being researched. The excellent mechanical properties of this fiber apparently arise from its uniform, fine grained ( 0.04 to 0.1 pm [0.002 to 0.004 mils]) microstructure and its single-phase stoichiometric p-SiC composition. [Pg.38]

The tensile creep and creep rupture properties of Prepreg HiPerComp composites have also been evaluated in air for times up to 1000 hours. These data are summarized in... [Pg.110]


See other pages where Properties creep rupture is mentioned: [Pg.2518]    [Pg.153]    [Pg.261]    [Pg.41]    [Pg.962]    [Pg.102]    [Pg.203]    [Pg.26]    [Pg.231]    [Pg.439]    [Pg.214]    [Pg.2273]    [Pg.483]    [Pg.261]    [Pg.509]    [Pg.302]    [Pg.2522]    [Pg.274]    [Pg.68]    [Pg.36]    [Pg.37]    [Pg.62]    [Pg.66]    [Pg.51]    [Pg.77]    [Pg.84]   


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