Texture and lattice strain evolution in a pearlitic steel during shear deformation: An in situ synchrotron X-ray diffraction study

IF 9.4 1区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Plasticity Pub Date : 2024-08-20 DOI:10.1016/j.ijplas.2024.104083

Carlos Samuel Alves da Silva , Breno Rabelo Coutinho Saraiva , Ladislav Novotný , Paulo Willian Carvalho Sarvezuk , Mohammad Masoumi , Cleiton Carvalho Silva , Luis Flávio Gaspar Herculano , Jorge Luiz Cardoso , Hamilton Ferreira Gomes de Abreu , Miloslav Béreš

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Abstract

In-situ synchrotron X-ray diffraction experiments were conducted on the pearlitic steel sample with a carbon content of 0.74% by weight. Specimens were subjected to uniaxial loading that induced shear deformation and two-dimensional diffraction patterns were acquired. The evolution of the lattice microstrain and the strain-resolved crystallographic texture development of both ferrite (α-BCC) and cementite (θ-orthorhombic) phases were followed. The analysis revealed that the texture changed from {110}<113>_α to {113}<121>_α component and then, stabilized at {013}<uvw>_α orientations. The θ phase exhibited a weak texture in the {100, 010, and 001}_θ family planes. Additionally, it was revealed that the nucleation of interfacial defects at the α/θ interface promotes the amorphization of cementite and the activation of slip systems in less densely packed {310}_α planes. The influence of microstructural changes on mechanical properties is discussed.

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剪切变形过程中珠光体钢的纹理和晶格应变演变：同步辐射 X 射线衍射原位研究

对含碳量为 0.74% （重量百分比）的珠光体钢样品进行了原位同步辐射 X 射线衍射实验。对试样进行单轴加载，诱发剪切变形，并获取二维衍射图样。对铁素体（α-BCC）和雪明石（θ-正方体）两相的晶格微应变演变和应变分辨结晶纹理发展进行了跟踪。分析表明，纹理从{110}<113>α转变为{113}<121>α成分，然后稳定在{013}<uvw>α取向。θ相在{100、010和001}θ族平面上表现出微弱的纹理。此外，研究还发现，α/θ界面上界面缺陷的成核促进了雪明碳酸盐的非晶化，并激活了密度较低的{310}α平面上的滑移系统。本文讨论了微观结构变化对力学性能的影响。

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来源期刊

International Journal of Plasticity 工程技术-材料科学：综合

CiteScore

15.30

自引率

26.50%

发文量

256

审稿时长

46 days

期刊介绍： International Journal of Plasticity aims to present original research encompassing all facets of plastic deformation, damage, and fracture behavior in both isotropic and anisotropic solids. This includes exploring the thermodynamics of plasticity and fracture, continuum theory, and macroscopic as well as microscopic phenomena. Topics of interest span the plastic behavior of single crystals and polycrystalline metals, ceramics, rocks, soils, composites, nanocrystalline and microelectronics materials, shape memory alloys, ferroelectric ceramics, thin films, and polymers. Additionally, the journal covers plasticity aspects of failure and fracture mechanics. Contributions involving significant experimental, numerical, or theoretical advancements that enhance the understanding of the plastic behavior of solids are particularly valued. Papers addressing the modeling of finite nonlinear elastic deformation, bearing similarities to the modeling of plastic deformation, are also welcomed.