A common possibility to further improve strength and creep behavior of such β-solidifying TiAl alloys is e.g. alloying with β-stabilizing substitutional solid solution hardening elements Nb, Mo, Ta, W as well as the addition of interstitial hardening elements C and N which are also carbide and nitride forming elements.
To demonstrate that there is much room for further improving mechanical strength of these polyamides, we carried out a preliminary study by introducing metal ligand coordination.
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The generation of zeolite minerals and packing action of filamentous C S H gels further improved the strength and water resistance of the paste.
In modern industry, the developing tendency and prospect for productions of the oil and gas pipeline steels is to further improve the strength and toughness by advanced manufacture process of the thermo-mechanical control process (TMCP) to refine microstructure.
Reinforcement of the B2 Ni Al shells by Mn partitioning further improves the strength of the precipitation-strengthened alloys by forming ultrastable and high number density core shell nanoprecipitates.
Also, the results of measuring surface free energy components of bitumen indicated that use of nano-composite increased the force required for producing the aggregate's stripping in the bitumen, which further improved the strength of the asphalt mix against moisture damage.
Also, when niobium exceeds its solubility limit in the steel matrix, it precipitates as a carbide or nitride, acting as a grain refiner and further improving the toughness and strength of the steel.
The interstitials content does not have notable impact on the tensile strength at room temperature and 373 K. But, at 473 K, the minor change in sulfur content from 0.03 to 0.061 at.% raises the ultimate strength by 150 MPa while the boron doping further improves the tensile strength.
This steel possesses excellent mechanical properties and the ductility can be further improved without compromising strength because the refined microstructure contains martensite, retained austenite and deformation-induced ferrite.
