The paper studies the mechanical properties of the Fe–Ni–Cr alloy and the ultrasound propagation velocity (Rayleigh waves) during its plastic deformation within the temperature range of 180 ≤ T ≤ 318 K. Rayleigh wave propagation velocity is measured by a periodic generation of 100 ns pulses by a transmitting piezoelectric transducer and wave propagation recording by a receiving piezoelectric transducer connected to a digital oscilloscope. It is shown that the temperature decrease changes not only the deformation curve at the uniaxial tension, but also the stress-strain curve of the ultrasound velocity associated with the growth in the martensitic α′-phase appeared after the γ–α′ phase transformation.

该论文研究了 Fe-Ni-Cr 合金在 180 ≤ T ≤ 318 K 温度范围内塑性变形过程中的力学性能和超声传播速度（瑞利波）。瑞利波传播速度是通过周期性产生的100 ns 脉冲由发射压电换能器和波传播记录由连接到数字示波器的接收压电换能器进行。结果表明，温度降低不仅改变了单轴拉伸下的变形曲线，而且还改变了与γ-α′相变后出现的马氏体α′相生长相关的超声速度的应力-应变曲线。