Characterisation of heterogeneous microstructure in large forged products using nonlinear ultrasonic method

被引：11
作者：
Abraham, Saju T. [1 ]
Shivaprasad, S. [2 ]
Das, C. R. [1 ]
Albert, S. K. [1 ]
Venkatraman, B. [1 ]
Balasubramaniam, Krishnan [2 ]
机构：
[1] Indira Gandhi Ctr Atom Res, Homi Bhabha Natl Inst, Kalpakkam 603102, Tamil Nadu, India
[2] Indian Inst Technol, Ctr Nondestruct Evaluat, Chennai, Tamil Nadu, India
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2020年 / 36卷 / 06期
关键词：
Abnormal grain growth; heterogeneous grain size distribution; nonlinear ultrasonics; harmonic generation; stainless steel forgings; AUSTENITIC STAINLESS-STEEL; GRAIN-SIZE DISTRIBUTION; MECHANICAL-PROPERTIES; VELOCITY-MEASUREMENTS; DAMAGE ASSESSMENT; FATIGUE DAMAGE; ATTENUATION; 304-STAINLESS-STEEL; RECRYSTALLIZATION; OPTIMIZATION;
D O I：
10.1080/02670836.2020.1732077
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A comparative study between the ultrasonic attenuation and the nonlinearity is presented for the characterisation of microstructure in large dimension forgings. Results are provided for two austenitic stainless steel forgings of AISI type 304L with a diameter 200 mm, where microscopic observations reveal abnormal grain growth near the surface of one of the forgings. Frequency dependence of the nonlinearity parameter is used to discern variations in grain size in these forgings more precisely than attenuation measurements. The distribution of grain size is shown to have a significant influence on the nonlinearity parameter. Relative changes in the nonlinearity parameter with applied frequency were correlative with the microstructural variations in both the forgings.
引用
收藏
页码：699 / 708
页数：10
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