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domain walls thickness（畴壁厚度），density（密度），alignment（取向）对低合金钢中巴克豪森噪声发射的影响。

Influence of domain walls thickness, density and alignment on Barkhausen noise emission in low alloyed steels.

机构信息

University of Žilina, Univerzitná 1, 010 26, Žilina, Slovakia.

Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16, Praha 2, Czech Republic.

出版信息

Sci Rep. 2023 Apr 7;13(1):5687. doi: 10.1038/s41598-023-32792-1.

DOI:10.1038/s41598-023-32792-1
PMID:37029152
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10082025/
Abstract

This study deals with the characterization of low alloyed steels of different yield strengths (varying in the range of 235-1100 MPa) via Barkhausen noise emission. The study investigates the potential of this technique to distinguish among the low alloyed steels and all significant aspects contributing to Barkhausen noise, such as the residual stress state, microstructure expressed in terms of dislocation density, grain size, prevailing phase, as well as associated aspects of the domain wall substructure (domain wall thickness, energy, their spacing and density in the matrix). Barkhausen noise in the rolling as well as transversal direction grows along with the yield strength (up to 500 MPa) and the corresponding grain refinement of ferrite. As soon as the martensite transformation occurs in a high strength matrix, this evolution saturates, and remarkable magnetic anisotropy is developed when Barkhausen noise in the transversal direction grows at the expense of the rolling direction. The contribution of residual stresses as well as the domain wall thickness is only minor, and the evolution of Barkhausen noise is driven by the density of the domain walls and their realignment.

摘要

本研究通过巴克豪森噪声发射对不同屈服强度（变化范围为 235-1100 MPa）的低合金钢进行了特性描述。该研究调查了该技术在区分低合金钢方面的潜力，以及对巴克豪森噪声有显著影响的所有方面，如残余应力状态、用位错密度、晶粒尺寸、主要相表示的微观结构，以及畴壁亚结构的相关方面（畴壁厚度、能量、在基体中的间距和密度）。沿轧制方向和横向方向的巴克豪森噪声随屈服强度（高达 500 MPa）和铁素体的相应晶粒细化而增大。一旦高强度基体中发生马氏体相变，这种演变就会饱和，并且当横向方向的巴克豪森噪声增长而牺牲轧制方向时，就会产生显著的磁各向异性。残余应力和畴壁厚度的贡献较小，巴克豪森噪声的演变由畴壁密度及其重排驱动。

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本文引用的文献

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Magnetic Bloch oscillations and domain wall dynamics in a near-Ising ferromagnetic chain.近伊辛铁磁链中的磁布洛赫振荡和畴壁动力学
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ISA Trans. 2022 Jun;125:318-329. doi: 10.1016/j.isatra.2021.07.015. Epub 2021 Jul 12.
3
The critical Barkhausen avalanches in thin random-field ferromagnets with an open boundary.
具有开放边界的薄随机场铁磁体中的临界巴克豪森雪崩。
Sci Rep. 2019 Apr 19;9(1):6340. doi: 10.1038/s41598-019-42802-w.
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Materials (Basel). 2019 Feb 22;12(4):660. doi: 10.3390/ma12040660.
5
Playing with universality classes of Barkhausen avalanches.探索巴克豪森雪崩的普适类
Sci Rep. 2018 Jul 26;8(1):11294. doi: 10.1038/s41598-018-29576-3.