Heterogeneous slip localization in an additively manufactured 316L stainless steel

被引：50

作者：

Bean, C. ^{[1
]}

Wang, F. ^{[2
]}

Charpagne, M. A. ^{[1
]}

Villechaise, P. ^{[3
]}

Valle, V. ^{[3
]}

Agnew, S. R. ^{[4
]}

Gianola, D. S. ^{[5
]}

Pollock, T. M. ^{[5
]}

Stinville, J. C. ^{[1
]}

机构：

[1] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[2] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Sch Mat Sci & Engn, Shanghai, Peoples R China

[3] Univ Poitiers, Inst PPRIME, CNRS, ENSMA, Chasseneuil, France

[4] Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA USA

[5] Univ Calif Santa Barbara, Mat Dept, Santa Barbara, CA USA

来源：

INTERNATIONAL JOURNAL OF PLASTICITY | 2022年 / 159卷

关键词：

High-resolution digital image correlation; Scanning electron microscopy digital image; correlation; Plastic localization; Slip localization; Additively manufactured 316L stainless steel; DIGITAL IMAGE CORRELATION; NICKEL-BASED SUPERALLOY; ELECTRON-MICROSCOPY; DISLOCATION DYNAMICS; HIGH-STRENGTH; STRAIN; STRESS;

D O I：

10.1016/j.ijplas.2022.103436

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Additively manufactured 316L stainless steels display significantly higher yield strength than their as-cast or wrought counterparts. This is associated with the micro-scale cellular structure and complex grain and sub-grain structure, resulting from high cooling rates occurring during the additive manufacturing process. The consequences of these peculiar microstructural features on plastic localization early in the plastic regime at the sub-grain scale are investigated. The plastic localization involved during monotonic deformation of conventional and additive manufactured 316L stainless steels is investigated using high-resolution digital image corre-lation. Significant heterogeneous slip localization is observed in the additively manufactured 316L stainless steels compared to the wrought 316L stainless steels. The cellular structure and low-angle grain boundaries are observed to control the incipient plasticity. In addition, slip localization characteristics indicate that the additional strengthening in the AM material is mainly related to the cellular structure acting as a dislocation forest-type obstacle.

引用

页数：16

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