Effects of anvils shape and technological conditions on the quality during hot cogging process of the two—phase titanium alloy

IF 2.6 3区材料科学 Q2 ENGINEERING, MANUFACTURING

International Journal of Material Forming Pub Date : 2025-10-04 DOI:10.1007/s12289-025-01944-1

Marcin Kukuryk

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引用次数: 0

Abstract

In this paper, a new method of the cogging process of a forging (type: shaft) consisting in the application of the multi-stage process composed of a preparatory shaping on three different kinds of convex anvils, and also in a primary forging on the flat anvils and the asymmetrical V-shaped ones, is presented. The new, implemented method of forging was subjected to tests in the aspect of the formation of conditions favourable for the location of the maximum values of effective strain in the particular zones of the forging being deformed whereas simultaneously marked by the absence of tensile stresses. That renders it possible to develop a scientific foundation for the development of the rational technology of the cogging process. The effective geometrical parameters of new convex anvils were determined, and the efficiency of different applied technological parameter was analysed, in the aspect of the intensity of the re-forging of the particular zones of an ingot. The investigations were complemented by prognosing the formation of ductile fractures in the course of forging with the application of the Normalized Cockcroft and Latham criterion. The analysis of the spatial strain state and stress was conducted with the application of the finite element method and of the DEFORM-3D software. The comparison between theoretical outcomes, and the outcomes of experiments, within the scope of the investigation indicates a good level of their commensurateness.

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顶砧形状及工艺条件对两相钛合金热齿槽成形质量的影响

本文介绍了一种轴类锻件的齿槽加工新方法，即在三种不同凸砧上进行预成形的多阶段工艺，以及在平砧和不对称v形砧上进行初锻的多阶段工艺。新的，实施的锻造方法是在形成有利于有效应变最大值的位置的条件方面进行测试，在锻造变形的特定区域，同时以无拉伸应力为标志。这就为合理的排齿工艺的发展奠定了科学的基础。确定了新型凸顶的有效几何参数，分析了不同应用工艺参数对铸锭特定部位再锻强度的影响。应用归一化Cockcroft和Latham准则对锻造过程中韧性断裂的形成进行了预测。采用有限元法和DEFORM-3D软件对其空间应变状态和应力进行了分析。在调查范围内，理论结果和实验结果之间的比较表明它们的通约性水平很高。

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来源期刊

International Journal of Material Forming ENGINEERING, MANUFACTURING-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.10

自引率

4.20%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal publishes and disseminates original research in the field of material forming. The research should constitute major achievements in the understanding, modeling or simulation of material forming processes. In this respect ‘forming’ implies a deliberate deformation of material. The journal establishes a platform of communication between engineers and scientists, covering all forming processes, including sheet forming, bulk forming, powder forming, forming in near-melt conditions (injection moulding, thixoforming, film blowing etc.), micro-forming, hydro-forming, thermo-forming, incremental forming etc. Other manufacturing technologies like machining and cutting can be included if the focus of the work is on plastic deformations. All materials (metals, ceramics, polymers, composites, glass, wood, fibre reinforced materials, materials in food processing, biomaterials, nano-materials, shape memory alloys etc.) and approaches (micro-macro modelling, thermo-mechanical modelling, numerical simulation including new and advanced numerical strategies, experimental analysis, inverse analysis, model identification, optimization, design and control of forming tools and machines, wear and friction, mechanical behavior and formability of materials etc.) are concerned.