利用电阻率测量BCC铁中伴随塑性变形的晶格缺陷密度变化的定量

IF 0.3 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Tetsu To Hagane-journal of The Iron and Steel Institute of Japan Pub Date : 2023-11-01 DOI:10.2355/tetsutohagane.tetsu-2023-050

Soichiro Takenaka, Ryohei Takahashi, Kazuhiro Ishikawa, Yoji Miyajima

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引用次数: 0

摘要

利用电阻率测量和x射线衍射(XRD)分析了bcc纯铁在拉伸变形过程中晶格缺陷密度的变化。作为bcc纯铁，采用超低碳钢(ULCS)和无间隙钢(IF)作为模型试样。采用Williamson Hall法和XRD对位错密度进行了评价，结果表明，在~5%的塑性应变后，ULCS的位错密度约为3.7×1015 m−1,IF钢的位错密度约为1.4×1015 m−1。电阻率随塑性应变的增大而增大。因此，当塑性应变增加到0.3左右时，空位浓度增加，如ULCS为2.6×10−5,IF钢为3.4×10−5。此外，在ULCS塑性变形的初始阶段，碳原子可能通过位错从晶粒内部向晶界迁移。

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電気抵抗率測定を用いた塑性変形に伴うBCC鉄中の格子欠陥密度変化の定量

Change in lattice defects density in bcc pure iron due to tensile deformation was quantified by using both electrical resistivity measurements and X-ray diffraction (XRD). As bcc pure irons, ultra-low carbon steel (ULCS) and interstitial free (IF) steel are used as the model specimen. Dislocation density evaluated using Williamson Hall method with XRD shows the saturation with the value of around 3.7×1015 m−1 for ULCS and around 1.4×1015 m−1 for IF steel after plastic strain after ~5%. Increase in electrical resistivity was observed with increasing plastic strain. Consequently, increase in vacancy concentration occurs with increasing plastic strain of around 0.3, such as, 2.6×10−5 for ULCS and 3.4×10−5 for IF steel. Additionally, the migration of carbon atoms from grain interior to grain boundary via dislocation might occur at the initial stage of plastic deformation in ULCS.

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来源期刊

Tetsu To Hagane-journal of The Iron and Steel Institute of Japan 工程技术-冶金工程

CiteScore

0.70

自引率

33.30%

发文量

审稿时长

6-12 weeks

期刊介绍： The journal ISIJ International first appeared in 1961 under the title Tetsu-to-Hagané Overseas. The title was changed in 1966 to Transactions of The Iron and Steel Institute of Japan and again in 1989 to the current ISIJ International. The journal provides an international medium for the publication of fundamental and technological aspects of the properties, structure, characterization and modeling, processing, fabrication, and environmental issues of iron and steel, along with related engineering materials. Classification I Fundamentals of High Temperature Processes II Ironmaking III Steelmaking IV Casting and Solidification V Instrumentation, Control, and System Engineering VI Chemical and Physical Analysis VII Forming Processing and Thermomechanical Treatment VIII Welding and Joining IX Surface Treatment and Corrosion X Transformations and Microstructures XI Mechanical Properties XII Physical Properties XIII New Materials and Processes XIV Social and Environmental Engineering.