Theoretical and experimental study of amorphization and lattice transformation of pure magnesium by ultra-precision cutting method

IF 15.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys Pub Date : 2025-04-18 DOI:10.1016/j.jma.2025.03.023

Chunlei He, Shuqi Wang, Siyu Xia, Chengzu Ren

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Abstract

Pure magnesium is a very promising material in the fields of biomedical and engineering. Obtaining pure magnesium with superior mechanical properties has consistently been a significant challenge in the area of materials science. This study focuses on investigating the processing method and strengthening mechanism of pure magnesium by ultra-precision cutting. The research results show that the pure magnesium grains were significantly refined after ultra-precision cutting. The average grain size reduced from ∼24 µm to nanometers, and the average nano-hardness increased from 1.02 GPa to 2.82 GPa. Amorphous pure magnesium structure and body-centered cubic (BCC) lattice pure magnesium were reported. Molecular dynamics (MD) simulation confirmed that the high shear strain and hydrostatic pressure during ultra-precision cutting was the origin of amorphization and lattice transformation. The amorphous phase and a significant number of long-period stacking-ordered (LPSO) phases inside the pure magnesium were responsible for the high hardness after ultra-precision cutting.

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超精密切削纯镁非晶化与晶格转变的理论与实验研究

纯镁在生物医学和工程领域是一种非常有前途的材料。获得具有优异机械性能的纯镁一直是材料科学领域的一个重大挑战。研究了纯镁的超精密切削加工方法及强化机理。研究结果表明，超精密切削后，纯镁晶粒明显细化。平均晶粒尺寸从~ 24µm减小到纳米级，平均纳米硬度从1.02 GPa增加到2.82 GPa。报道了无定形纯镁结构和体心立方晶格纯镁结构。分子动力学（MD）模拟证实了超精密切削过程中的高剪切应变和静水压力是非晶化和晶格转变的根源。非晶相和大量长周期堆积有序相（LPSO）是镁合金在超精密切削后具有高硬度的主要原因。

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来源期刊

Journal of Magnesium and Alloys Engineering-Mechanics of Materials

CiteScore

20.20

自引率

14.80%

发文量

审稿时长

59 days

期刊介绍： The Journal of Magnesium and Alloys serves as a global platform for both theoretical and experimental studies in magnesium science and engineering. It welcomes submissions investigating various scientific and engineering factors impacting the metallurgy, processing, microstructure, properties, and applications of magnesium and alloys. The journal covers all aspects of magnesium and alloy research, including raw materials, alloy casting, extrusion and deformation, corrosion and surface treatment, joining and machining, simulation and modeling, microstructure evolution and mechanical properties, new alloy development, magnesium-based composites, bio-materials and energy materials, applications, and recycling.