Typical Room-Temperature Tensile Properties

Ti-3Ai-2.5V Typical room-temperature tensile properties for solution treated plus aged specimens... 

IMI685 Typical room-temperature tensile properties... 

Typical room-temperature tensile properties are higher than the guaranteed minimums (see table), which vary with section size. Lower strengths occur in the annealed condition, or when STA material has been worked in the P phase field prior to heat treatment. 

Ti-10V-2Fe-3AI Typical room-temperature tensile properties of an airframe forging... 

Because of the effects of impurity content and processing history, the mechanical properties of vanadium and vanadium alloys vary widely. The typical RT properties for pure vanadium and some of its alloys are hsted in Table 4. The effects of ahoy additions on the mechanical properties of vanadium have been studied and some ahoys that exhibit room-temperature tensile strengths of 1.2 GPa (175,000 psi) have strengths of up to ca 1000 MPa (145,000 psi) at 600°C. Beyond this temperature, most ahoys lose tensile strength rapidly. 

Table 1 Typical physical and (room temperature) mechanical properties (melting point Tm, glass transition temperature Tg) Young s modulus E, Izod toughness, tensile yield stress av elongation at break b) and applications of commodity polyolefins...

Typical properties of several epoxy-polysulfide adhesives are shown in Table 11.18. Room temperature tensile shear strength ranges from about 500 to 3000 psi, depending on the substrate and the adhesive formulation. Generally, tensile strength properties reach a maximum at about 10 to 30 percent polysulfide concentration. Peel strength can be as high as 20 lb/in. 

The physical properties of a typical room temperature-cured polyester concrete is as follows Barcol hardness (50), tensile strength (500 kg cm 2), elongation (0.45%), compressive strength (1400 kg cm 2) flexural strength (1050 kg cm ) and heat deflection (41"C). The latter may be Increased by 30 by the use of fumaric acid Instead of maleic acid. 

Thus, several important mechanical properties of metals may be determined from tensile stress-strain tests. Table 6.2 presents some typical room-temperature values of yield strength, tensile strength, and ductility for several common metals. These properties are sensitive to any prior deformation, the presence of impurities, and/or any heat treatment to which the metal has been subjected. The modulus of elasticity is one mechanical parameter that is insensitive to these treatments. As with modulus of elasticity, the magnitudes of both yield and tensile strengths decline with increasing temperature just the reverse holds for ductility —it usually increases with temperature. Figure 6.14 shows how the stress-strain behavior of iron varies with temperature. 

Mechanical Properties. The room temperature modulus and tensile strength are similar to those of other amorphous thermoplastics, but the impact strength and ductility are unusually high. Whereas most amorphous polymers arc glass-like and brittle below their glass-transition temperatures, polycarbonate remains ductile to about — 10°C. The stress-strain curve for polycarbonate typical of ductile materials, places it in an ideal position for use as a metal replacement. Weight savings as a metal replacement are substantial, because polycarbonate is only 44% as dense as aluminum and one-sixth as dense as steel. 

Consider two cases of spherical particles, one of KRO-1 morphology of a volume fraction of 0.23 of randomly wavy PB rods, and the other pure PB — both occupying a volume fraction of 0.22 in PS. We are interested in the craze initiation condition for these two particles at room temperature under a uniaxial tensile stresso. We consider the state of stress at a typical equatorial point A along the particle interface, on the PS side of the particle, as shown in Fig. 33. We determine first by standard methods the elastic properties of the particles and their thermal expansion coefficients, together with the elastic properties and thermal expansion coefficients of the composite matrix as a whole consisting of particles and the majority phase of PS. 

Polymers of this type dissolve readily in a nunber of solvents and this plus high tensile without need for vulcanization provides an excellent product for use in adhesives where a strong and flexible bond is required. For other applications these products can be easily shaped using procedures common for thermoplastics yet provide elastic properties typical of nibbers at temperatures below the softening point of polystyrene. Set is low at room temperature but will of course be high if deformation occurs at elevated temperatures followed by cooling. Recycling of scrap is feasible since vulcanization is not used. 

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