At Room Temperature Research on Hydrostatic Extrusion of the TZM Alloy
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- Category: Molybdenum knowledge
- Published on 23 September 2015
- Written by yiping
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Tensile tests and compressive tests under pressures up to 450,000 psi on TZM alloy, at room temperature, provided data on yield point, ultimate tensile strength, and ductility as a function of environmental fluid pressure. These data indicate the initial feasibility of metalworking under pressure at room temperature without cracking or fracture.
The specific metalworking process chosen was fluid-to-fluid extrusion. The fulid-to-fluid extrusion of TZM molybdenum alloy was conducted at room temperature at pressures up to 450,000 psi. It was determined that any of several fluids were suitable as the extrusion medium. Excellent finishes could be obtained even from rough-surface billets. Reductions in area up to 4:1 were made without fracture, although it is believed that much larger reductions are feasible. The experimental work was conducted on TZM molybdenum alloy in the forms of stress-relieved, recrystallized, and as-cast material. It was found that stress-relieved material actually was in a state of high residual stress. Techniques were developed for eliminating the difficulties caused by these stresses.
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