1983 Volume 24 Issue 11 Pages 765-772
Measurements of Young’s modulus at 150–700 K, thermal expansion, hardness and tensile strength at room temperature were carried out for Mn–Cu–Ti and Mn–Cu–Zr alloys subjected to various heat treatments and cold-working. Young’s modulus vs temperature curves of the annealed alloys have a distinct minimum and a maximum, in association with the antiferromagnetic\
ightleftarrowsparamagnetic transition. The Elinvar properties appear in the temperature range in the neighborhood of this anomaly.
The temperature coefficient of Young’s modulus at room temperature is affected by annealing, cold-working, reheating after cold-working and the alloy composition. Young’s modulus and hardness increase with addition of titanium or zirconium. The tensile strength shows a maximum at 3–4% titanium or zirconium. No aging effect on mechanical strength and hardness is observed in the ternary alloys.
Therefore, these alloys are very suitable for use as materials of precision instruments. We call these alloys “MANGALOY”.
