首页|Strengthening retention and structural stability of the Al-Al3Ni eutectic at high temperatures
Strengthening retention and structural stability of the Al-Al3Ni eutectic at high temperatures
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NSTL
Elsevier
A sharp difference was revealed between strengthening retention of the Al-Al3Ni eutectic at temperatures up to 500 & nbsp;C and room-temperature strengthening recovery after high-temperature exposures. Although the Al3Ni fibers exhibited high coarsening resistance that led to a remarkable recovery of about 80% of the eutectic yield stress after 1 week exposure at 500 & nbsp;C, they were ineffective in retaining the strength at high temperatures that at 500 & nbsp;C reached only 20% of the room-temperature level; the same retention ratio as for the identically-deformed pure aluminum that resembled the eutectic composite matrix. During uniaxial compression at 400-500 C, the steady-state flow stress with negligible work hardening rate developed for both the eutectic and pure aluminum. The Al3Ni fibers did not act as potent nuclei towards promoting the dynamic recrystallization, resulting in dynamic recovery being the only microstructure restoration mechanism during hot deformation.
NSTL
Elsevier
