塑性变形和疲劳条件下碳钢焊接接头热影响区的超声波和金相研究

IF 0.5 4区工程技术 Q4 MECHANICS

Journal of Applied Mechanics and Technical Physics Pub Date : 2024-01-15 DOI:10.1134/S0021894423050218

A. V. Gonchar, A. A. Solov’ev

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引用次数: 0

摘要

摘要采用金相和超声脉冲回波技术研究了 St3sp 钢样品在单轴拉伸和疲劳下的失效情况。试样从焊接接头中切割出来，特别是从母体金属区域和热影响区的不完全再结晶区域切割出来。对热影响区和母体金属中持续滑移带的演变进行了比较分析。建立了超声波法测定的泊松比与材料力学特性之间的关系。提出了估算单轴拉伸下塑性寿命和疲劳失效前循环次数的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

ULTRASONIC AND METALLOGRAPHIC STUDY OF THE HEAT-AFFECTED ZONE OF A CARBON STEEL WELDED JOINT UNDER PLASTIC DEFORMATION AND FATIGUE

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ULTRASONIC AND METALLOGRAPHIC STUDY OF THE HEAT-AFFECTED ZONE OF A CARBON STEEL WELDED JOINT UNDER PLASTIC DEFORMATION AND FATIGUE

Failure of an St3sp steel sample under uniaxial tension and fatigue is studied using metallographic and ultrasonic pulse-echo techniques. Samples are cut out from a welded joint, particularly from a parent metal area and an incomplete recrystallization area in the heat-affected zone. The evolution of persistent slip bands in the heat-affected zone and those in the parent metal are subjected to a comparative analysis. A relationship between Poisson’s ratio determined by the ultrasonic method and the mechanical characteristics of the material is established. Methods for estimating the plasticity life under uniaxial tension and the number of cycles before fatigue failure are proposed.

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来源期刊

Journal of Applied Mechanics and Technical Physics 物理-力学

CiteScore

1.20

自引率

16.70%

发文量

审稿时长

4-8 weeks

期刊介绍： Journal of Applied Mechanics and Technical Physics is a journal published in collaboration with the Siberian Branch of the Russian Academy of Sciences. The Journal presents papers on fluid mechanics and applied physics. Each issue contains valuable contributions on hypersonic flows; boundary layer theory; turbulence and hydrodynamic stability; free boundary flows; plasma physics; shock waves; explosives and detonation processes; combustion theory; multiphase flows; heat and mass transfer; composite materials and thermal properties of new materials, plasticity, creep, and failure.