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The effect of Si,Zr, Al and Mo on the structure and strength of Ti martensite

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Abstract

The structure and strength of martensite in “near α” titanium alloys have been studied in the composition range (wt %) up to 10% Zr, 6%, Al, 1/2% Mo, 2.4% Si. [0001], 1/3 〈11¯20〉 dislocations, 1/3 〈10¯10〉 stacking faults and approximately {10¯11} twin related martensite plates are found to be common features of the martensite. Martensite “midribs” consist either of finely transformed material between martensite plates, or regions of low dislocation density within martensite plates.

The martensite morphology is related to the alloy composition, changing from “massive” to “plate-like” with increasing solute content. The strength of the martensite is controlled largely by solid solution strengthening.

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Flower, H.M., Swann, P.R. & West, D.R.F. The effect of Si,Zr, Al and Mo on the structure and strength of Ti martensite. J Mater Sci 7, 929–938 (1972). https://doi.org/10.1007/BF00550440

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