Heat-treatment effects on a bimetallic additively-manufactured structure (BAMS) of the low-carbon steel and austenitic-stainless steel

被引：82

作者：

Ahsan, Md. R. U. ^{[1
]}

Tanvir, A. N. M. ^{[1
]}

Seo, Gi-Jeong ^{[2
]}

Bates, Brian ^{[3
]}

Hawkins, Wayne ^{[3
]}

Lee, Chanho ^{[4
]}

Liaw, P. K. ^{[4
]}

Noakes, Mark ^{[5
]}

Nycz, Andrzej ^{[5
]}

Kim, Duck Bong ^{[2
]}

机构：

[1] Tennessee Technol Univ, Dept Mech Engn, Cookeville, TN 38505 USA

[2] Tennessee Technol Univ, Dept Mfg & Engn Technol, Cookeville, TN 38505 USA

[3] Tennessee Technol Univ, Ctr Mfg Res, Cookeville, TN 38505 USA

[4] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[5] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA

来源：

ADDITIVE MANUFACTURING | 2020年 / 32卷

关键词：

Bimetallic additively-manufactured structure (BAMS); Wire plus arc additive manufacturing (WAAM); Cold metal transfer (CMT); Gas metal arc welding (GMAW); And heat-treatment; LOW-ALLOY STEEL; FUNCTIONALLY GRADED MATERIAL; MECHANICAL-PROPERTIES; SIGMA-PHASE; WELDING PROCESSES; DELTA-FERRITE; ELECTRON-BEAM; ARC; MICROSTRUCTURE; WIRE;

D O I：

10.1016/j.addma.2020.101036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A bimetallic additively-manufactured structure (BAMS) is a type of functionally-graded multi-material structure used for achieving different complementary material properties within the same structure as well as cost optimization. Wire + arc additive manufacturing (WAAM) offers the capability to fabricate the BAMS in a simultaneous or sequential way. To fully utilize the benefits of the BAMS, the interfacial joint should be strong, and each of the constituents should have reasonable mechanical integrity. For this, a BAMS of low-carbon steel and austenitic-stainless steel was fabricated using a gas-metal-arc-welding (GMAW)-based WAAM process. Then, the BAMS was heat-treated at a range of 800 degrees C to 1100 degrees C and 30 min to 2 h. This resulted in 35% and 250% increases in the ultimate tensile strength and elongation, compared to the as-deposited BAMS. After the heat-treatment, the failure location moved from the low-carbon-steel to the stainless-steel side. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDAx), and the Vickers hardness test were used to characterize the BAMS. In this paper, it is experimentally validated that heat-treatment at 950 degrees C-1 h is the near-optimal condition for the BAMS.

引用

页数：14

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