The effect of grain size and initial texture on microstructure, texture, and formability of Nb stabilized ferritic stainless steel manufactured by two-step cold rolling

Rodrigues, Daniella Gomes; Alcântara, Cláudio Moreira de; Oliveira, Tarcísio Reis de; Gonzalez, Berenice Mendonça

doi:10.1016/j.jmrt.2019.07.024

Cited by 38 publications

(11 citation statements)

References 26 publications

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“…。磨削作为马氏体时效钢精加工的常用手段，除了能保证较高的尺寸和形状精度外，还适用于各种复杂结构零件的加工需求，且对于微型化产品及薄壁件的加工都具有十分重要的意义 [3][4] 。马氏体时效钢相成分的转变会极大地影响工件机械工程学报第 58 卷第 11 期期 270 性能 [5] ，其中马氏体有助于提升材料的强度和硬度 [6] ，而奥氏体会影响材料的韧性、塑性、磁性和残余应力 [7][8] 。JERMOLAJEV 等 [9] 通过对淬火钢工件进行磨削实验，发现在不同的残余奥氏体比率条件下，改变磨削过程接触时间和接触区温度会对材料相变产生很大影响。DING 等 [10] 提出了一种考虑磨削工艺参数的组合当量来优化控制相变。机械加工过程中合理地控制相成分的转变对稳定材料使用性能具有十分重要的意义。磨削过程中的力、热载荷会导致微观晶粒结构发生改变，直接表现为晶粒尺寸的变化，影响工件的综合性能 [11][12] 。晶粒尺寸常作为判断材料性能的重要依据，通过控制晶粒细化，可以提高工件的强度、韧性及疲劳寿命 [13] 。RODRIGUES 等 [14] 研究发现晶粒尺寸细化有利于提升工件强度，SIMM 等 [15] 还发现较小的晶粒尺寸有助于提高材料的疲劳寿命，da SILVA 等 [16] 指出，较小的晶粒尺寸可以提高材料的抗氢脆性能，这对航天结构件的实际制造具有十分重要的意义。然而，目前关于微观晶粒的研究多是基于热处理的成型加工，通过调整不同加热温度以及保温时间实现对微观晶粒演化的控制，这与磨削加工的特殊环境有所不同，并且目前针对磨削相变过程中实际发生的微观晶粒演化的研究较少。相成分转变与微观晶粒的演化密不可分，在碳浓度和微观结构能量梯度下，晶界发生迁移促进奥氏体形核、长大，导致晶粒尺寸及相成分发生改变 [17] 。YEDDU 等 [18] 发现晶粒尺寸增大会抑制马氏体的转变，WANG 等 [19] 研究表明较小的晶粒尺寸还有助于奥氏体成分的稳定性。LI 等 [20] 指出通过控制奥氏体晶粒尺寸可以有效地调整材料中不同相的比例，RYKLINA 等…”

Section: 空航天领域得到了很好的应用 [1-2]unclassified

Research on Phase Transformation Analysis and Process Optimization of Grinding Considering Microscopic Grains

2022

Journal of Mechanical Engineering

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：The alternating forces and thermal loads during the grinding process can change the microscopic grains in the material, resulting in phase transformation that can affect the performance of high-end aerospace parts. In this article, the relationship between microscopic grains and phase transformation are taken as the entry point, and the influence of process parameters on the microscopic grain of the material is analyzed through grinding experiments on the maraging steel 3J33, which is a kind of materials for manufacture of inertial navigation components. The mechanism of grain size and orientation difference angle on the transformation ratio of different phase components is investigated, and the key process factors affecting phase transformation are discussed. Then a phase transformation prediction model considering microscopic grains is established, and the results shows that the proposed model can calculate the transformation ratio of the phases more accurately than traditional phase transformation model based on heating rate and strain rate. On this basis, the sensitivity of the process parameters to the transformation of each phase is quantitatively calculated, and a process optimization scheme for grain refinement and phase transformation control is proposed, which provides a theoretical basis and engineering guidance for high-performance grinding of maraging steel.

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Section: 空航天领域得到了很好的应用 [1-2]unclassified

Research on Phase Transformation Analysis and Process Optimization of Grinding Considering Microscopic Grains

2022

Journal of Mechanical Engineering

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“…Several studies have investigated the texture evolution of FSSs during forming processes using different techniques such as X-ray diffraction (XRD) [8][9][10][11][12], electron backscatter diffraction (EBSD), and scanning electron microscopy (SEM), [8][9][10][11][12][13][14][15][16][17][18] and only a small number of studies employed transmission electron microscopy (TEM) [13,19]. Some of these studies focused on cold-worked FSSs.…”

Section: Introductionmentioning

confidence: 99%

A Combined Microscopy Study of the Microstructural Evolution of Ferritic Stainless Steel upon Deep Drawing: The Role of Alloy Composition

Núñez,

Collado,

De la Mata

et al. 2024

JMMP

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Ferritic stainless steel (FSS) is widely used to manufacture deep-drawn products for corrosion resistance applications, being the alloy drawability strongly affected by its microstructural anisotropy. This study combines a variety of microscopy techniques enabling in-depth analyses of the microstructural evolution of two different FSSs correlated to their deep drawing performance. One of the steels has a good correspondence with the standard EN-1.4016 (AISI 430). The other is a modified version of the previous one with higher contents of the ferrite-stabilising elements Si and Cr, and lower contents of the austenite-stabilising elements C, N, and Mn. Electron Backscatter Diffraction results confirm that the microstructural properties and drawability of FSS in the deep drawing process are improved in the modified steel version. Scanning transmission electron microscopy under low-angle annular dark field conditions evidences that the deformation mechanism of FSS during deep drawing follows a microstructural distortion model based on the grain size gradient and shows a variation of the deformation texture depending on the alloy composition. This work demonstrates the potential of advanced microscopy techniques for optimising the processing and design of ferritic stainless steels, with slight variations in the alloy composition, for deep drawing applications.

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“…Zhang et al [ 12 ] claimed that the existence of shear bands could enhance the recrystallization nucleation rate during the hot-rolling and annealing process, which intensified the {111} textures in the final sheet. Rodrigues et al [ 13 ] pointed out that reducing the size of the original grains of the specimen can enhance the γ-fiber component among the recrystallization textures. In addition, the distribution of the grain boundary has a great influence on the mechanical and corrosion properties of materials [ 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Cold-Rolling Reduction on Recrystallization Microstructure, Texture and Corrosion Properties of the X2CrNi12 Ferritic Stainless Steel

Wang³

et al. 2022

Materials

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X2CrNi12 ferritic stainless steel has a wide range of application prospects in the railway transportation, construction, and automobile fields due to its excellent properties. The properties of X2CrNi12 ferritic stainless steel can be further improved by cold-rolling and subsequent annealing treatment. The purpose of this work is to investigate the effect of cold-rolling reduction on the microstructure, texture and corrosion properties of the recrystallized X2CrNi12 ferritic stainless steel by using SEM, TEM, EBSD and electrochemical testing technology. The results show that the crystal orientation characteristics of the cold-rolled sheet could be inherited into the annealed sheet. The higher cold-rolling reduction could promote the deformed grains rotating into the {111}<uvw> orientation, increasing storage energy and driving force for recrystallization, which could reduce the recrystallized grain size. The orientation densities of α-fiber and γ-fiber were low at 50% cold-rolling reduction. After recrystallization annealing, a large number of grains with random orientation could be produced, and the texture strength was weakened. When the cold-rolling reduction rose to 90%, the γ-fiber texture at {111}<110> was strengthened and the α-fibers, particularly the {112}<110> component, were weakened after recrystallisation annealing, which could improve the formability of the steels. The proportions of special boundaries, i.e., low-angle grain boundaries and low-Σ CSL boundaries, among the grain boundary distribution of the recrystallized X2CrNi12 stainless steel were higher when the reduction was 90%, especially when the annealing temperature was 770 °C. Additionally, the proportion of LAGBs and low-Σ CSL boundaries were 53% and 7.43%, respectively, which improves the corrosion resistance of the matrix, showing the best corrosion resistance.

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The effect of grain size and initial texture on microstructure, texture, and formability of Nb stabilized ferritic stainless steel manufactured by two-step cold rolling

Cited by 38 publications

References 26 publications

Research on Phase Transformation Analysis and Process Optimization of Grinding Considering Microscopic Grains

Research on Phase Transformation Analysis and Process Optimization of Grinding Considering Microscopic Grains

A Combined Microscopy Study of the Microstructural Evolution of Ferritic Stainless Steel upon Deep Drawing: The Role of Alloy Composition

Effect of Cold-Rolling Reduction on Recrystallization Microstructure, Texture and Corrosion Properties of the X2CrNi12 Ferritic Stainless Steel

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