Differences between Tensile Properties of WAAM SS304 Components in Different Directions

Yu, Huiyin; Zhu, Xiaolei; Wang, Jian; Lu, Xiaofeng

doi:10.1002/srin.202300013

Cited by 4 publications

(1 citation statement)

References 37 publications

(52 reference statements)

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“…Most of the work is focused on austenitic alloys with corrosion resistance properties [2,20,[40][41][42][43][44][45][46], whereas heat-resistant pearlitic steel 12Cr1MoV attracts less attention and insufficient number of works devoted to the additive manufacturing of products from heat-resistant pearlitic steel.…”

Section: Introductionmentioning

confidence: 99%

Structure and Mechanical Behavior of Heat-Resistant Steel Manufactured by Multilayer Arc Deposition

Vlasov,

Gordienko,

Eremin

et al. 2023

Metals

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The manuscript demonstrates the structure and the mechanical behavior of a material manufactured by multilayer arc deposition. Three-dimensional printing was performed using OK Autrod 13.14 wire on a substrate of heat-resistant 12Cr1MoV steel in the standard gas metal arc welding (GMAW) mode and in the coldArc mode with reduced heat input. The printed materials have 40–45% higher strength and 50–70% lower ductility compared to the substrate. The microhardness of the printed materials is higher than the substrate, but it is reduced at the transition regions between the deposited layers. These regions have been studied using optical microscopy and digital image correlation. Such layer boundaries are an additional factor in reducing the plasticity of the material. The increase in strength and decrease in ductility for printed materials compared to the ferrite–pearlitic substrate is associated with a high cooling rate and the formation of a mixture of acicular and allotriomorphic ferrite, which have higher hardness. The structure of the obtained layers along the height is non-uniform and undergoes changes during the deposition of new layers. The main difference between the 3D printing modes is the reduced heat input in the coldArc mode, which results in less heat accumulation and faster cooling of the wall. Thus, a more dispersed and solid structure was formed compared with GMAW. It was concluded that the cooling rate and the level of heat input are the main factors affecting the structure formation (martensitic, bainitic, or ferritic), the height and quality of the surface, and the mechanical properties of the printed wall.

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Section: Introductionmentioning

confidence: 99%

Structure and Mechanical Behavior of Heat-Resistant Steel Manufactured by Multilayer Arc Deposition

Vlasov,

Gordienko,

Eremin

et al. 2023

Metals

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Effects of Heat Treatment on Microstructure and Properties of 347 Stainless Steel Alloy Prepared by Wire Arc Additive Manufacturing

Yadegar,

Sharifitabar,

Shafiee Afarani

2023

steel research int.

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In this study, 347 austenitic stainless steel parts were made by wire arc additive manufacturing process. Then, the effects of solution heat treatment at 1150°C for 3h followed by NbC stabilizing heat treatment at 950°C for 1h on the properties of the alloy were investigated. Results showed that after solidification, δ‐ferrite and NbC carbide particles were formed in the γ matrix while heat treatment eliminated the δ phase. Tensile test results showed that for the as‐prepared alloy yield strength varied between 336MPa and 352MPa, tensile strength between 559MPa and 589MPa, and elongation between 50 and 58%. However, heat treatment resulted in a 20‐22% decrease in yield strength, a 5‐10% decrease in tensile strength, and a 5% decline in elongation. The potentiodynamic (PD) polarization test results showed that the ICORR and the corrosion rate of the WAAM 347 stainless steel in the as‐prepared condition were separately 4.9 times and 5.6 times higher than the wrought alloy. After heat treatment, the ICORR increased from 5.84×10‐6 A/cm2 in the as‐prepared alloy to 6.68×10‐6 A/cm2, and the corrosion rate from 0.0678 to 0.0776 mm/y. This means that the heat treatment deteriorated the corrosion resistance of the WAAM 347 stainless steel alloy by about 14%.This article is protected by copyright. All rights reserved.

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Optimization of Wire Arc Additive Manufacturing Process Parameters for Low‐Carbon Steel and Properties Prediction by Support Vector Regression Model

Barik,

Bhandari,

Mondal

2023

steel research int.

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This study aims to optimize the process parameters of wire arc additive manufacturing for ER70S6 steel and build a machine‐learning model to predict the properties of deposited specimens. Process parameters such as current, voltage, and travel speed are optimized considering other process parameters constant (gas flow rate, contact tip to the work distance, and preheat). The optimization is made using the response surface method and validated the properties by experimentation, including tensile testing and metallography. A support vector regression machine‐learning model is implemented to predict the material’s properties to substantiate the outcomes’ values in every possible combination for the given parameters. The study’s findings reveal a significant enhancement in specimen quality, marked by reduced irregularities and porosity, and a remarkable increase in ultimate tensile strength up to 40%, validated through the SVR model. This study sketches a valuable path that can be extended to predict properties of other material systems.This article is protected by copyright. All rights reserved.

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Differences between Tensile Properties of WAAM SS304 Components in Different Directions

Cited by 4 publications

References 37 publications

Structure and Mechanical Behavior of Heat-Resistant Steel Manufactured by Multilayer Arc Deposition

Structure and Mechanical Behavior of Heat-Resistant Steel Manufactured by Multilayer Arc Deposition

Effects of Heat Treatment on Microstructure and Properties of 347 Stainless Steel Alloy Prepared by Wire Arc Additive Manufacturing

Optimization of Wire Arc Additive Manufacturing Process Parameters for Low‐Carbon Steel and Properties Prediction by Support Vector Regression Model

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