Thermomechanical tensile strength

Figure 9.2 Comparison of the effect of repeated recycling of Kraft and thermomechanical pulp (TMP) fibres on tensile strength and fibre swelling. 

Figure 18. Temperature dependence of ultimate tensile strength (UTS), tensile yield strength (YS), brit-tle-to-ductile transition temperature (BDTT), and tensile elongation (El) for two-phase TiAl alloys with various microstructures produced under various processing conditions, in particular thermomechanical processing (TMP) (Kim and Dimiduk, 1991).

Fig. 8.1 2 The mechanical properties for the stir zone in Fig 8.11, showing the distribution of (a) yield strength, (b) tensile strength, and (c) ductility for tensile test coupons aligned with the local longitudinal axis for the multipass raster pattern. Exceptional strength/ductility combinations are achieved near the plate surface, although low dii tTt apparent in the thermomechanically affected zone under the stir...

The effect of the amount of natural fibre such as corn stover, the fibre length and the amount of cross-linker such as divinylbenzene with rm-butyl peroxide on the structure and thermomechanical properties of the soybean and linseed oil-based green composites, revealed that the properties were improved with an increase in the amount of fibre and a decrease in the length of the fibre. Mechanical properties like Young s modulus and the tensile strengths of the composites increased from 291-1398 MPa and 2.1-1 A MPa, respectively for 20-80 wt% fibre loading. However, water uptake also increases under these conditions. The composites contain... 

Figure 15.8 Tensile strength and equilibrium water uptake of TPS reinforced with Eucalyptus wood pulps (a-c) Kraft pulp (b-d) thermomechanical pulp. Reproduced with permission from Reference [147].

The microstructure refinement from the modified thermomechanical treatment is responsible for enhancement of tensile strength and ductility by 18% and 25% respectively. Simultaneously, the stress rupture life as well as ductility is enhanced by virtue of controlled grain size and uniform carbide distribution brought about by the thermo-mechanical treatment. 

Figure 7.11. Dependence of some thermomechanical properties of semi-SINs on PPS/TDI ratio. (1) Tensile strength (2) elongation (3) softening temperature. ...

Chitin nanowhiskers obtained from crab shells were incorporated into SPI to improve the thermomechanical properties and to decrease water sensitivity of the SPI (Lu et al. 2004). A relatively uniform distribution of the chitin whisker in the SPI matrix can be observed when the chitin content is lower than 15 wt%. With an increase of chitin whiskers in the SPI matrix from 0 to 30 wt%, enhanced thermal, mechanical, and water resistance of the soy protein composite was observed. The water diffusion coefficients (D) of the nanocomposites decrease from 2.56 x 10 to 1.23 X 10 ° cm s . The tensile strength and Young s modulus of the composites increase from 3.3 to 8.4 MPa and from 26.4 to 158 MPa with increasing chitin content from 0 to 20 wt%, whereas the elongation at break of the filled composites decreases from 205 to 29 %. The improvement in all of the properties of these novel SPI/chitin whisker nanocomposites may be ascribed to three-dimensional networks of intermolecular hydrogen bonding interactions between filler and filler and between filler and SPI matrix. 

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