Study of strength and elastic properties of microribbon made from BrB2 beryllium bronze

Conclusions

• 1. The mechanical properties of beryllium bronze in the microsection considerably exceed those attained for macrosections.

• 2. The tempering regimes for microsections are substantially different from those established for macrosections.

  For microribbons made with a total reduction of more than 50%, the optimum tempering regime is 270°C and soaking for 40 min.

• 3. Raising the heating temperature of the wire prior to quenching from 730–800° does not bring about any change in the strength or elastic properties of microribbon made from it with a high degree of deformation (more than 50%).

• 4. It was established that the elastic recovery (during torsion) of beryllium bronze microribbon is decisively influenced by the presence of oxide films on the surface, no matter whether formed during heat-treatment as a result of corrosion, or due to any other origin. These films sharply increase the reverse elastic recovery.