Microstructure-Superplastic Properties Relationship and Deformation Mechanism in a Novel Dual-Phase Medium Mn Steel: The Effect of Microstructure Anisotropy and Texture

Metallurgical and Materials Transactions A Pub Date : 2024-07-05 DOI:10.1007/s11661-024-07493-7

Haijun Pan, Chaofan Wei, Shunhu Zhang, Wenhao Zhou, Zhiqiang Wu, Lin Liu, Yi Zhao

{"title":"Microstructure-Superplastic Properties Relationship and Deformation Mechanism in a Novel Dual-Phase Medium Mn Steel: The Effect of Microstructure Anisotropy and Texture","authors":"Haijun Pan, Chaofan Wei, Shunhu Zhang, Wenhao Zhou, Zhiqiang Wu, Lin Liu, Yi Zhao","doi":"10.1007/s11661-024-07493-7","DOIUrl":null,"url":null,"abstract":"In this paper, the tensile properties, texture evolution, and deformation anisotropy of a cold-rolled Fe−0.3C–6.86Mn–3.5Al steel during superplastic deformation at 650 °C–750 °C and 0.25 × 10−3 s−1− 4 × 10−3 s−1 were studied. In particular, under 750 °C and 1 × 10−3 s−1, the anisotropic microstructure evolution and texture characteristics were measured using EBSD. The results indicate that Medium Mn steel (MMS) sheets exhibit significant anisotropy under high tensile stress. The transverse direction (TD) specimens exhibit the highest peak strength of 145 MPa, and rolling direction (RD) specimens exhibit the highest elongation of 1295 pct. The plastic anisotropy r value of the RD sample varied more significantly than that of the TD sample. When the RD sample fractures, the aspect ratio reaches its minimum value (1.52), and ellipse fitting angle (θ) distributes from 0 to 90 degree and from 180 to 90 degree, which indicates that a large number of grains have undergone rotation.","PeriodicalId":18504,"journal":{"name":"Metallurgical and Materials Transactions A","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Metallurgical and Materials Transactions A","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1007/s11661-024-07493-7","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 0

Abstract

In this paper, the tensile properties, texture evolution, and deformation anisotropy of a cold-rolled Fe−0.3C–6.86Mn–3.5Al steel during superplastic deformation at 650 °C–750 °C and 0.25 × 10⁻³ s⁻¹− 4 × 10⁻³ s⁻¹ were studied. In particular, under 750 °C and 1 × 10⁻³ s⁻¹, the anisotropic microstructure evolution and texture characteristics were measured using EBSD. The results indicate that Medium Mn steel (MMS) sheets exhibit significant anisotropy under high tensile stress. The transverse direction (TD) specimens exhibit the highest peak strength of 145 MPa, and rolling direction (RD) specimens exhibit the highest elongation of 1295 pct. The plastic anisotropy r value of the RD sample varied more significantly than that of the TD sample. When the RD sample fractures, the aspect ratio reaches its minimum value (1.52), and ellipse fitting angle (θ) distributes from 0 to 90 degree and from 180 to 90 degree, which indicates that a large number of grains have undergone rotation.

Abstract Image

查看原文本刊更多论文

新型双相中锰钢的显微组织-超塑性关系和变形机理：显微组织各向异性和纹理的影响

本文研究了一种冷轧 Fe-0.3C-6.86Mn-3.5Al 钢在 650 °C-750 °C 和 0.25 × 10-3 s-1-4 × 10-3 s-1 的超塑性变形过程中的拉伸性能、组织演变和变形各向异性。特别是在 750 °C 和 1 × 10-3 s-1 条件下，使用 EBSD 测量了各向异性微观结构的演变和纹理特征。结果表明，中锰钢 (MMS) 板材在高拉伸应力下表现出明显的各向异性。横向（TD）试样的峰值强度最高，达到 145 兆帕；轧制方向（RD）试样的伸长率最高，达到 1295 pct。与 TD 试样相比，RD 试样的塑性各向异性 r 值变化更为显著。当 RD 试样断裂时，纵横比达到最小值（1.52），椭圆拟合角 (θ) 分布在 0 至 90 度和 180 至 90 度之间，这表明大量晶粒发生了旋转。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Metallurgical and Materials Transactions A

自引率

0.00%

发文量