Mechanical property data

Table 13 is a representative Hst of nickel and cobalt-base eutectics for which mechanical properties data are available. In most eutectics the matrix phase is ductile and the reinforcement is britde or semibritde, but this is not invariably so. The strongest of the aHoys Hsted in Table 13 exhibit ultimate tensile strengths of 1300—1550 MPa. Appreciable ductiHty can be attained in many fibrous eutectics even when the fibers themselves are quite britde. However, some lamellar eutectics, notably y/y —5, reveal Htde plastic deformation prior to fracture. 

Inorganic membranes (29,36) are generaUy more stable than their polymeric counterparts. Mechanical property data have not been definitive for good comparisons. IndustriaUy, tube bundle and honeycomb constmctions predominate with surface areas 20 to 200 m. Cross-flow is generaUy the preferred mode of operation. Packing densities are greater than 1000 /m. Porous ceramics, sintered metal, and metal oxides on porous carbon support... 

Merospace Structural Metals Handbook, Mechanical Properties Data Center, Department of Defense, Belfour Stulen, Inc., Code 5301, Mar. 1963, p. 5. 

In Table 1 some of the properties of raw synthetic hj -l,4-polyisoprene (Goodyear s Natsyn) and natural mbber (Hevea) are presented along with references that contain additional thermal, optical, electrical, and mechanical property data. Some properties of synthetic /n j -l,4-polyisoprene (Kuraray TP-301) are also given. Molecular weights and mol wt distribution are determined by gel-permeation chromatography (gpc) (11). 

Fluorinated rubbers, copolymers of hexafluoropropylene and vinylidene-fluorides, have excellent resistance to oils, fuels and lubricants at temperatures up to 200°C. They have better resistance to aliphatic, aromatic and chlorinated hydrocarbons and most mineral acids than other rubbers, but their high cost restricts their engineering applications. Cheremisinoff et al. [54] provide extensive physical and mechanical properties data on engineering plastics. A glossary of terms concerned with fabrication and properties of plastics is given in the last section of this chapter. 

Table 3-1 gives typical mechanical property data for four materials, the exact values of which are unimportant for this discussion. Aluminum and mild steel have been used as representative metals and polypropylene (PP) and glass fiber-TS polyester reinforced plastics (GRP) as representative plastics. Higher-performance types could have been selected for both the metals and plastics, but those in this table offer a fair comparison for the explanation being presented. 

Comparative Mechanical Properties Data on Ordinary ZnO and Nano-ZnO-Filled Carboxylated Nitrile Rubber Systems... 

Despite the fact that inorganic membranes are, in general, more stable mechanically than organic membranes, available mechanical properties data for commercial inorganic membranes are sketchy and these are not yet standardized for comparing various membranes. It appears that the methods used for obtaining various mechanical strength data are based on those for solid (nonporous) bodies and most of them arc listed as ASTM procedures. 

Table 3.3. Mechanical Property Data of Various Inorganic Membrane Elements...

Mechanical Properties. Mechanical properties obtained on the cured resins included tensile strength and fracture toughness. Tensile tests were run on an Instron model 1122 Universal Tester with a crosshead speed of 0.02 /minute. Tests were run on dry and saturated samples in air. Fracture toughness (K ) values have been obtained using a MTS 610 Materials Testing System at 0.02 /minute at ambient and elevated temperatures in air. The compact tensile specimens tested were 0.5 x 0.5 x 0.125 in dimension. Mechanical properties data are based on the results from four or more tests run at each condition. 

Finally, the ultimate test of the success of any textbook is whether or not it stays on your bookshelf. It is hoped that the extent of physical and mechanical property data, along with the depth with which the subjects are presented, will serve the student well as they transition to the world of the practicing engineer or continue with their studies in pursuit of an advanced degree. 

The organosilane chemicals utilized in glass composites are trifunctional silanes—i.e., they contain three hydrolyzable groups per silicon atom. Upon hydrolysis, the silanol group adheres strongly to the glass surface. The mechanism by which this takes place is inherently difficult. The indirect confirmation is much better documented through mechanical property data. 

The present study, by contrast, deals with toughening of cycloaliphatic type epoxies with anhydride curing agents normally used in industrial applications. In addition to developing mechanical property data, the morphological characteristics were also studied. 

Although SEMs or ESEMs are very powerful in imaging nanoscale materials or particles, caution should be taken to avoid electron beam damage to specimen. This is particularly important when a nanomanipulation system with a force measurement device is to be used to characterise the mechanical properties of particles. Ren et al. (2007, 2008) identified that such damage depended on the electron dose and exposure time, as well as the type of materials under test, and it is extremely important to find a time window in which the damage is negligible to obtain reliable mechanical property data. 

The magnetostriction constant, Awo, is calculated to be 1870 ppm at 50 K at the magnetic field of 12 T. To calculate this value the elastic constant difference cn - cn was evaluated to be 50 GPa using mechanical properties data [22], The measured value of A100 is very high, comparable to that... 

Few examples of the homogeneous diblock-incompatible homo-polymer behavior have been reported. One that has received considerable attention is the system polystyrene-poly-a-methylstyrene (2). Block copolymers of styrene and a-methylstyrene exhibit a single loss peak in dynamic experiments (2,3) and have been shown to be thermorheologi-cally simple (4) hence they are considered to be homogeneous. Mechanical properties data on these copolymers also has been used to validate interesting extensions of the molecular theories of polymer viscoelasticity (2,3,4). 

The dynamic mechanical property data for Groups 1,2,and 3 materials were obtained from a Polymer Laboratory Model 983 Dynamic Mechanical Thermal Analyzer (DMTA), and include log tan S (loss factor), log E (storage modulus), and log E (loss modulus). Frequency was held constant at 10 Hz for all samples. The superposed results are shown for each group in Figures 2-10. 

Dynamic mechanical property data were obtained using Du Pont DMA 982 instrument for structural analyses and Rheology DVE instrument for measurement of damping ability. Scanning electron microscopy was performed on samples etched with strong chromic acid. The mechanical properties were measured at 20°C by tensile test. 

The results In Table II help quantify the differences In cure behavior between 6K-60 and 6K-62. Previous experiments (2 ) using thermal analysis techniques have found that the Initiation period for BK-62 Is shorter than that for BK-60. The same trend Is seen In the mechanical properties data. Moreover, the rate at which the properties change once curing has begun Is approximately 50% greater for BK-62 than for BK-60. When these results are combined with the observation that a major problem with the performance of BK-62 on the press Is excessive drying on the plate, the Inescapable conclusion Is that the differences In curing behavior are a major source of the problems with BK-62. 

Mechanical property data of various inorganic membrane elements... 

However, for thermorheologically simple materials, that is, for those materials for which the time-temperature superposition principle holds, the mechanical properties data can be shifted parallel to the time or frequency axis. This fact suggests an additional hypothesis that can be very useful in solving some specific thermoviscoelastic problems. According to this hypothesis, the net effect of temperature in the response must be equivalent to a variation in the rates of creep or relaxation of the material. Thus for T > Tq the process occurs at a higher rate than at Tq. 

Table 2 lists the thermal and mechanical property data used for the model calculation. The thermal conductivity and elastic modulus of sprayed YPSZ are often an order of magnitude smaller than the bulk values. This is due to extensive microcracks and imbonded gaps between lamellae. 

Table 12.9. Sources for low-speed mechanical properties data of polymer blends, examples... 

Mechanical properties data for friction stir welded 5083 Al are limited (Ref 15, 34, 35). In... 

A-36. Almost 200 m (over 200 yd) of A-36 have been welded using PCBN tools. A wide range of weld parameters has been found to give fully consolidated welds. Surface quality is excellent. No mechanical property data are available. 

AL-6XN has been welded with PCBN tools. Microhardness values look appropriate. It is very difficult to fully consolidate the advancing side of the weld. No mechanical properties data are available. Further weld development on this alloy is dependent on improved PCBN grades. 

Reference 24 reported on the welding of type 430 stainless steel using PCBN tools. The weld was performed at 550 rpm, with a travel speed of 80 mm/min (3.15 in./min). The weld was a partial penetration bead-on-plate weld. No mechanical property data were obtained. The weld appeared to be fully consolidated. Surface... 

Merker, et. a1. (13) reported that block copolymers of TMPS-DMS segments exhibited elastomeric properties and considerable toughness because of the crystalline TMPS blocks. The tensile strengths increased with molar concentration and block lengths of TMPS. Examples of some mechanical property data are as follows ... 

It should be emphasized that the existing volume of mechanical property data is small and, due to the variations in preparation methods (i.e. purity, use of RAP or not, etc.), storing conditions of these moisture-sensitive glasses and also in the final chemical compositions versus the nominal ones, the mechanical characterization of HMFG should be considered as only of approximate nature. The wide scatter observed for most data is also in part a result of this fact. 

This paper summarizes the results of an evaluation of weldments in four candidate austenitic stainless alloys, AISI 310S, Kromarc 58, Pyromet 538, and A-286. Various combinations of welding processes, filler materials, and, in the case of Kromarc 58, pre- and postweld treatments are considered. Radiographic, metal-lographic, and fractographic examinations of all weldments were conducted. Mechanical (tensile) and fracture mechanics property data were determined with transverse weldment samples from room temperature to 4 K. 

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