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Raham

  • one year ago

5 impotent mechanical properties of titanium (alloy)?

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  1. raane
    • one year ago
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    Tensile Properties. Unalloyed titanium may have tensile strengths ranging from 35,000 psi (250 MPa) for high purity metal produced by the iodide reduction process to 100,000 psi (690 MPa) for metal produced with sponge titanium of high hardness. The arc-melted unalloyed titanium products are reasonably ductile. Ductility. The arc-melted commercially pure titanium products range in ductility from 20% to 40% elongation and from 45% to 65% reduction in area, depending upon the interstitial content. The iodide process titanium yields a product possessing 55% elongation with 80% reduction in area. As is the case with steel, titanium is alloyed with other metals to increase its strength. Such metallic additions as Al, V, Cr, Fe, Mn, Sn are employed either as binary additions or as complex systems. The resulting increase in strength is accomplished, however, with a lowering of ductility. Modulus of Elasticity. Unalloyed titanium has a modulus of about 15x106 psi and can be increased to about 18x106 psi by alloying. Titanium’s modulus compares favorably with those of aluminum (10.4x106) and magnesium (6.4x106) but poorly with that of steel (29x106). Like the modulus of elasticity the modulus in shear, modulus of rigidity, of titanium falls between that of aluminum and that of steel. Hardness. Titanium is a much harder metal than aluminum and approaches the high hardness possessed by some of the heat-treated alloy steels. Iodide purity titanium has a hardness of 90 VHN (Vickers), unalloyed commercial titanium has a hardness of about 160 VHN and when alloyed and heat-treated, titanium can attain hardnesses in the range of 250 to 500 VHN. A typical commercial alloy of 130,000 psi yield strength might be expected to have a hardness of about 320 VHN or 34 Rockwell C. Impact Resistance. Knowledge of tensile strength and ductility of a metal is insufficient for many engineering applications without the knowledge of toughness. Titanium falls among the few metals capable of possessing good toughness along with high strength and ductility. Titanium may have impact strengths ranging from more than 100 foot pounds Charpy for the higher purity iodide product and 30 foot pounds for the commercial unalloyed product to 1 or 2 foot pounds for some of the high strength but brittle alloys.

  2. raane
    • one year ago
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    u can also visit this web http://www.keytometals.com/Article126.htm

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