Effect of plastic deformation on the phase composition and electromagnetic characteristics of the 321N austenitic steel (08Kh18N10T)

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2022-12-01 DOI:10.17804/2410-9908.2022.6.095-106

L. Goruleva, S. M. Zadvorkin, A. N. Mushnikov

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Abstract

The changes in the phase composition and electromagnetic properties of the 321N chromium-nickel austenitic steel under plastic deformation by uniaxial tension are studied. As strain increases from 0 to 0.37, the content of ferromagnetic α′-martensite in the steel increases monotonically to 60%. The electrical resistivity and the initial magnetic permeability increase monotonically by factors of 1,25 and 18, respectively. To monitor the strain state and the content of α'-martensite in products made of the 321N steel, it is preferable to use initial magnetic permeability rather than electrical resistance. The skin layer thickness of the deformed 321N steel for frequencies from 5 to 1000 kHz is calculated from the experimental values of initial magnetic permeability and electrical resistivity. Eddy current diagnostics of the state of the surface of products made of this steel, hardened by surface plastic deformation, is proposed to be performed at frequencies ranging between 100 and 200 kHz.

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塑性变形对321N奥氏体钢(08Kh18N10T)相组成及电磁特性的影响

研究了321N铬镍奥氏体钢在单轴拉伸塑性变形下的相组成和电磁性能变化。随着应变从0增加到0.37，钢中铁磁性α′-马氏体的含量单调增加到60%。电阻率和初始磁导率分别以1、25和18的倍数单调增加。为了监测321N钢制品的应变状态和α′-马氏体含量，最好采用初始磁导率而不是电阻。根据初始磁导率和电阻率的实验值，计算了变形后的321N钢在5 ~ 1000 kHz频率范围内的蒙皮层厚度。通过表面塑性变形硬化的这种钢制成的产品的表面状态的涡流诊断，建议在100和200 kHz之间的频率范围内进行。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Diagnostics, Resource and Mechanics of materials and structures

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