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<p>A series of Ti-xAl-yFe alloy sheets were created using elemental powders and the direct powder rolling (DPR) process. Roll compaction from powders was done using vertical rolls, resulting in porous strips with green density in the range of 76 to 89% theoretical and sheet thicknesses in the range of 1.35 to 1.55&#xa0;mm. Following a common sinter step, the porous sheets were cold rolled through multiple reduction steps (with intermediate annealing steps in some cases), using horizontal rolls. This resulted in final densities of 98.5 to 99.2% and sheet thickness of 0.66 to 0.74&#xa0;mm. DPR alloys in the compositional range of 95 to 97 wt% Ti (balance Al + Fe) had tensile strengths in the same range of literature values for wrought Ti-xAl-yFe with similar compositions. Ductility reached 10% in some DPR alloys which was higher than those reported for other powder-based Ti-xAl-yFe alloys from the literature. The load cell instrumented cold rolling mill showed that higher pressures (i.e., up to 2700&#xa0;MPa) achieved during cold rolling were greater than that practical for uniaxial die compaction (i.e., &lt; 600&#xa0;MPa). This resulted in the high final densities achieved. The process is a viable option for the lower-cost sustainable production of Ti alloy sheet for the transportation industry.</p> Graphical Abstract <p></p>

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Direct Powder Rolling of Ti-xAl-yFe Alloy Sheet from Sponge CP-Ti and Elemental Al and Fe Powders

  • 期刊论文

  • 发表日期：

    2025年3月11日

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  • Shannon Clemens,
  • Stephen Corbin

摘要

A series of Ti-xAl-yFe alloy sheets were created using elemental powders and the direct powder rolling (DPR) process. Roll compaction from powders was done using vertical rolls, resulting in porous strips with green density in the range of 76 to 89% theoretical and sheet thicknesses in the range of 1.35 to 1.55 mm. Following a common sinter step, the porous sheets were cold rolled through multiple reduction steps (with intermediate annealing steps in some cases), using horizontal rolls. This resulted in final densities of 98.5 to 99.2% and sheet thickness of 0.66 to 0.74 mm. DPR alloys in the compositional range of 95 to 97 wt% Ti (balance Al + Fe) had tensile strengths in the same range of literature values for wrought Ti-xAl-yFe with similar compositions. Ductility reached 10% in some DPR alloys which was higher than those reported for other powder-based Ti-xAl-yFe alloys from the literature. The load cell instrumented cold rolling mill showed that higher pressures (i.e., up to 2700 MPa) achieved during cold rolling were greater than that practical for uniaxial die compaction (i.e., < 600 MPa). This resulted in the high final densities achieved. The process is a viable option for the lower-cost sustainable production of Ti alloy sheet for the transportation industry.

Graphical Abstract