基于金属磁记忆和声发射测试的不同组织AISI 1025碳钢变形行为研究

IF 0.5 4区材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Evaluation Pub Date : 2022-06-01 DOI:10.32548/2022.me-04195

W. Singh, CK Mukhopadhyay

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引用次数: 0

摘要

采用金属磁记忆和声发射测试（AE）技术研究了具有不同微观结构的AISI 1025型碳钢的拉伸变形行为。对七个AISI 1025碳钢试样进行不同微观结构的热处理，然后进行拉伸变形直至断裂。在拉伸变形过程中进行AE，并在卸载后使用巨型磁阻传感器测量变形引起的自漏磁场（SMLFs）。结果表明，SMLF信号值受微观结构和塑性变形引起的残余应力的影响。在不同的试样中，SMLF信号峰值振幅在盐水淬火试样中最高，其次是回火试样，而硬度在盐水淬火样品中最高。SMLF信号峰值振幅和硬度在退火样品中最低。与未回火试样相比，回火试样中的SMLF信号更高。从AE测量中可以观察到，马氏体钢在变形过程中会发出更高的声发射，但在回火时会降低。在马氏体钢中产生的声发射也具有更高的振幅。结果与光学显微照片和硬度测量结果相关联。

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Study of Deformation Behavior of AISI 1025 Carbon Steel with Different Microstructures Using Metal Magnetic Memory and Acoustic Emission Testing

Studies are carried out to investigate the tensile deformation behavior of AISI-type 1025 carbon steel with different microstructures using metal magnetic memory and acoustic emission testing (AE) techniques. Seven AISI 1025 carbon steel specimens were heat treated for different microstructures and then subjected to tensile deformation until fracture. AE was conducted during tensile deformation and the deformation-induced self-magnetic leakage fields (SMLFs) were measured using a giant magneto-resistive sensor after unloading. Results reveal that SMLF signal values are influenced by microstructure and residual stress aroused due to plastic deformation. Among different specimens, SMLF signal peak amplitude is highest in the brine-quenched specimen followed by the tempered specimen, while hardness is highest in the brine-quenched specimen. SMLF signal peak amplitude and hardness are the lowest in the annealed specimen. SMLF signal is higher in tempered specimens compared to the untempered specimens. From AE measurements, it is observed that martensitic steel emits higher acoustic emissions during deformation but decreases when tempered. The acoustic emissions generated in the martensitic steel are also of higher amplitude. The results are correlated with optical micrographs and hardness measurements.

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来源期刊

Materials Evaluation 工程技术-材料科学：表征与测试

CiteScore

0.90

自引率

16.70%

发文量

审稿时长

6-12 weeks

期刊介绍： Materials Evaluation publishes articles, news and features intended to increase the NDT practitioner’s knowledge of the science and technology involved in the field, bringing informative articles to the NDT public while highlighting the ongoing efforts of ASNT to fulfill its mission. M.E. is a peer-reviewed journal, relying on technicians and researchers to help grow and educate its members by providing relevant, cutting-edge and exclusive content containing technical details and discussions. The only periodical of its kind, M.E. is circulated to members and nonmember paid subscribers. The magazine is truly international in scope, with readers in over 90 nations. The journal’s history and archive reaches back to the earliest formative days of the Society.