Effect of Natural and Artificial Aging on Steel Mechanical Properties and Fracture Toughness

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Inorganic Materials: Applied Research Pub Date : 2022-12-01 DOI:10.1134/S2075113322060326

E. A. Yakovleva, A. V. Larionov, G. D. Motovilina, E. I. Khlusova

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Abstract—The operating conditions of welded structures of shipbuilding steels, including operation at northern latitudes, determine high requirements for their quality. Materials used for such structures should guarantee stable mechanical properties, good processability during hull fabrication, and serviceability at subzero temperatures. Strain aging is due to the thermodynamic nonequilibrium of steel structure in its initial state and gradual transition to the equilibrium state provided the diffusion mobility of interstitial atoms is sufficient. In unfavorable conditions, this can lead to the degradation of properties during processing (cold straightening, bending, welding), operation, or long-term storage. The paper studies the probability of natural and artificial aging processes in steels of different chemical compositions due to bulk diffusion and carbon dislocation core diffusion (dislocation pipe diffusion). The effect of strain aging on mechanical properties and the CTOD parameter value has been examined.

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自然时效和人工时效对钢力学性能和断裂韧性的影响

摘要船舶用钢焊接结构的作业条件，包括在北纬地区作业，对其质量提出了很高的要求。用于此类结构的材料应保证稳定的机械性能，在船体制造过程中具有良好的加工性，并能在零度以下的温度下使用。应变时效是由于钢结构在初始状态的热力学不平衡，在间隙原子的扩散迁移率足够大的情况下逐渐过渡到平衡状态。在不利的条件下，这可能导致在加工(冷矫直、弯曲、焊接)、操作或长期储存期间性能的退化。本文研究了不同化学成分的钢在体扩散和碳位错芯扩散(位错管扩散)作用下发生自然和人工时效的概率。研究了应变时效对合金力学性能和CTOD参数值的影响。

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来源期刊

Inorganic Materials: Applied Research Engineering-Engineering (all)

CiteScore

0.90

自引率

0.00%

发文量

199

期刊介绍： Inorganic Materials: Applied Research contains translations of research articles devoted to applied aspects of inorganic materials. Best articles are selected from four Russian periodicals: Materialovedenie, Perspektivnye Materialy, Fizika i Khimiya Obrabotki Materialov, and Voprosy Materialovedeniya and translated into English. The journal reports recent achievements in materials science: physical and chemical bases of materials science; effects of synergism in composite materials; computer simulations; creation of new materials (including carbon-based materials and ceramics, semiconductors, superconductors, composite materials, polymers, materials for nuclear engineering, materials for aircraft and space engineering, materials for quantum electronics, materials for electronics and optoelectronics, materials for nuclear and thermonuclear power engineering, radiation-hardened materials, materials for use in medicine, etc.); analytical techniques; structure–property relationships; nanostructures and nanotechnologies; advanced technologies; use of hydrogen in structural materials; and economic and environmental issues. The journal also considers engineering issues of materials processing with plasma, high-gradient crystallization, laser technology, and ultrasonic technology. Currently the journal does not accept direct submissions, but submissions to one of the source journals is possible.