On suppression of chip segmentation during cutting of Ti–6Al–4V alloy through control of texture rather than ductility

IF 2.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Research Pub Date : 2024-06-21 DOI:10.1557/s43578-024-01371-z
Karthik Palaniappan, H. Murthy, Balkrishna C. Rao
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Abstract

Understanding the crystallographic texture is of paramount importance for the suppression of segmentation in chips with refined microstructure in Ti–6Al–4V alloy. Segmentation is pronounced at all cutting speeds thereby hindering grain refinement in chips. This study illustrates that the crystallographic texture, not ductility, controls the segmentation in chips. The initial workpiece texture is modified by cold-rolling to 30% and 40% thickness reduction prior to cutting. The microstructure of chips revealed a gradual transformation of morphology from segmented to continuous. The suppression of chip segmentation stems from the texture of the workpiece. Texture studies of workpieces have revealed that the sheets exhibited a strong transverse texture which gradually becomes weak during cold-rolling. The weak transverse texture rather than ductility, obtained from the tensile experiments, is responsible for the continuous shear in chips.

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通过控制纹理而非延展性来抑制 Ti-6Al-4V 合金切削过程中的切屑分割
了解晶体纹理对于抑制 Ti-6Al-4V 合金中具有细化微观结构的切屑中的分段现象至关重要。在所有切削速度下,切段现象都很明显,从而阻碍了切屑中晶粒的细化。本研究说明,控制切屑中细化的是晶体纹理,而不是延展性。在切削之前,通过冷轧将工件厚度减薄 30% 和 40%,从而改变了工件的初始纹理。切屑的微观结构显示,形态从分段逐渐转变为连续。切屑分段的抑制源于工件的纹理。对工件纹理的研究表明,板材具有较强的横向纹理,在冷轧过程中逐渐变弱。造成切屑连续剪切的原因是薄弱的横向纹理,而不是拉伸实验中获得的延展性。
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来源期刊
Journal of Materials Research
Journal of Materials Research 工程技术-材料科学:综合
CiteScore
4.50
自引率
3.70%
发文量
362
审稿时长
2.8 months
期刊介绍: Journal of Materials Research (JMR) publishes the latest advances about the creation of new materials and materials with novel functionalities, fundamental understanding of processes that control the response of materials, and development of materials with significant performance improvements relative to state of the art materials. JMR welcomes papers that highlight novel processing techniques, the application and development of new analytical tools, and interpretation of fundamental materials science to achieve enhanced materials properties and uses. Materials research papers in the following topical areas are welcome. • Novel materials discovery • Electronic, photonic and magnetic materials • Energy Conversion and storage materials • New thermal and structural materials • Soft materials • Biomaterials and related topics • Nanoscale science and technology • Advances in materials characterization methods and techniques • Computational materials science, modeling and theory
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