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首页> 外文期刊>Journal of Materials Engineering and Performance >Characterization of Microstructural Changes During Annealing of Cold Worked Austenitic Stainless Steel Using Ultrasonic Velocity Measurements and Correlation with Mechanical Properties
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Characterization of Microstructural Changes During Annealing of Cold Worked Austenitic Stainless Steel Using Ultrasonic Velocity Measurements and Correlation with Mechanical Properties

机译：超声速度测量及其对冷轧奥氏体不锈钢退火过程中显微组织变化的影响

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摘要

A technique that is sensitive to change in texture is more reliable than mechanical property measurements for the study of recrystallization behavior in alloys where recrystallization is coupled with precipitation. Hence, ultrasonic velocity measurements have been employed to characterize microstructural changes during annealing of cold worked Ti-modified austenitic stainless steel where precipitation of TiC is known to retard recrystallization. Mechanical property measurements, such as strength and hardness, could not distinguish the recovery and recrystallization regimes, and it was difficult to determine the exact time or temperature for onset of recrystallization. The variation of velocity with annealing time or annealing temperature exhibited a three-stage behavior. The velocity exhibited a slight increase in the recovery region followed by a sharp and continuous decrease in the recrystallization region and reached saturation on completion of recrystallization. Based on the microstructural investigations, the three stages were identified to be recovery, progress of recrystallization, and completion of recrystallization. Velocity measurements could sense the onset, progress, and completion of recrystallization more accurately compared with that of hardness and strength measurements.
机译：对于研究再结晶与沉淀相结合的合金的再结晶行为，对组织变化敏感的技术比机械性能测量更可靠。因此，已经采用超声速度测量来表征冷加工的Ti改性奥氏体不锈钢的退火过程中的微观结构变化，其中已知TiC的沉淀会阻碍再结晶。力学性能的测量，例如强度和硬度，无法区分恢复和再结晶机制，因此很难确定开始再结晶的确切时间或温度。速度随退火时间或退火温度的变化表现出三阶段行为。速度在恢复区显示出轻微的增加，然后在重结晶区急剧而连续地减小，并且在重结晶完成时达到饱和。根据微观结构研究，确定了三个阶段：恢复，重结晶的进行和重结晶的完成。与硬度和强度测量相比，速度测量可以更准确地感测重结晶的开始，进行和完成。

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