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Liu J, Yang H, Meng L, Liu D, Xu T, Xu D, Shao X, Shao C, Li S, Zhang P, Zhang Z. Significance of Melt Pool Structure on the Hydrogen Embrittlement Behavior of a Selective Laser-Melted 316L Austenitic Stainless Steel. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1741. [PMID: 36837371 PMCID: PMC9965495 DOI: 10.3390/ma16041741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 02/14/2023] [Accepted: 02/16/2023] [Indexed: 06/18/2023]
Abstract
The hydrogen embrittlement (HE) behavior of a selective laser-melted (SLM) 316L austenitic stainless steel has been investigated by hydrogen charging experiments and slow strain rate tensile tests (SSRTs) at room temperature. The results revealed that compared to the samples without H, the ultimate tensile strength (UTS) and elongation (EL) of specimens were decreased from 572 MPa to 552 MPa and from 60% to 36%, respectively, after 4 h of electrochemical hydrogenation with a current density of 100 mA/cm2. The negative effects of hydrogen charging were more pronounced on the samples' ductility than on their strength. A quasi in situ EBSD observation proved that there was little phase transformation in the samples but an increased density of low angle grain boundaries, after 4 h H charging. After strain was applied, the surface of the H-sample displayed many hydrogen-induced cracks along the melt pool boundaries (MPBs) showing that these MPBs were the preferred areas for the gathering and transferring of hydrogen.
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Affiliation(s)
- Jie Liu
- Department of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
| | - Huajie Yang
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- Department of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Lingxiao Meng
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- Department of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Di Liu
- Department of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Tianqi Xu
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- Department of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Daokui Xu
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- Department of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Xiaohong Shao
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- Department of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Chenwei Shao
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- Department of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Shujun Li
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- Department of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Peng Zhang
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- Department of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Zhefeng Zhang
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- Department of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
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Yin P, Xu C, Pan Q, Zhang W, Jiang X. Effect of Different Ultrasonic Power on the Properties of RHA Steel Welded Joints. MATERIALS 2022; 15:ma15030768. [PMID: 35160714 PMCID: PMC8837030 DOI: 10.3390/ma15030768] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/14/2022] [Accepted: 01/18/2022] [Indexed: 11/16/2022]
Abstract
Based on the changes of microhardness, tensile strength, and impact resistance caused by the difference of macroscopic morphology and microstructure of welded joints, this paper studied the effect of different ultrasonic power on the properties of welded joints during the welding of homogeneous armor steel. It is experimentally found that the macroscopic morphology of those joints is very different. Compared with conventional welding, ultrasonic welding can increase the weld depth and the width of the heat-affected zone (HAZ) on either side of the weld. However, only the ultrasonic wave at an appropriate power level can increase the weld width. In addition, appropriate ultrasonic power can significantly improve the grain state of the weld. With the increase of ultrasonic power, the grain size in HAZ will decrease. The microhardness of the weld will first increase and then decrease, while the microhardness of the HAZ will increase. This is basically consistent with the changing trend of impact resistance. An ultrasonic wave can also increase the tensile strength of a welded joint up to 802 MPa, 12.4% higher than that in conventional welding. However, a high-power ultrasonic wave will bring down the tensile strength. This study provides guidance for the selection of ultrasonic-assisted regulation power to achieve the different properties of homogeneous armor steel joints.
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Affiliation(s)
- Peng Yin
- Key Laboratory of Fundamental Science for Advanced Machining, Beijing Institute of Technology, Beijing 100081, China; (P.Y.); (C.X.); (W.Z.); (X.J.)
| | - Chunguang Xu
- Key Laboratory of Fundamental Science for Advanced Machining, Beijing Institute of Technology, Beijing 100081, China; (P.Y.); (C.X.); (W.Z.); (X.J.)
| | - Qinxue Pan
- Key Laboratory of Fundamental Science for Advanced Machining, Beijing Institute of Technology, Beijing 100081, China; (P.Y.); (C.X.); (W.Z.); (X.J.)
- Correspondence:
| | - Wenjun Zhang
- Key Laboratory of Fundamental Science for Advanced Machining, Beijing Institute of Technology, Beijing 100081, China; (P.Y.); (C.X.); (W.Z.); (X.J.)
| | - Xiaowei Jiang
- Key Laboratory of Fundamental Science for Advanced Machining, Beijing Institute of Technology, Beijing 100081, China; (P.Y.); (C.X.); (W.Z.); (X.J.)
- Jiangsu Institute of Automation, Lianyungang 222061, China
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Raj Mohan R, Venkatraman R, Raghuraman S, Kumar PM, Rinawa ML, Subbiah R, Arulmurugan B, Rajkumar S. Processing of Aluminium-Silicon Alloy with Metal Carbide as Reinforcement through Powder-Based Additive Manufacturing: A Critical Study. SCANNING 2022; 2022:5610333. [PMID: 35087612 PMCID: PMC8763544 DOI: 10.1155/2022/5610333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 11/07/2021] [Accepted: 12/23/2021] [Indexed: 05/05/2023]
Abstract
Powder-based additive manufacturing (PAM) is a potential fabrication approach in advancing state-of-the-art research to produce intricate components with high precision and accuracy in near-net form. In PAM, the raw materials are used in powder form, deposited on the surface layer by layer, and fused to produce the final product. PAM composite fabrication for biomedical implants, aircraft structure panels, and automotive brake rotary components is gaining popularity. In PAM composite fabrication, the aluminium cast alloy is widely preferred as a metal matrix for its unique properties, and different reinforcements are employed in the form of oxides, carbides, and nitrides. However, for enhancing the mechanical properties, the carbide form is predominantly considered. This comprehensive study focuses on contemporary research and reveals the effect of metal carbide's (MCs) addition to the aluminium matrix processed through various PAM processes, challenges involved, and potential scopes to advance the research.
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Affiliation(s)
- R. Raj Mohan
- School of Mechanical Engineering, SASTRA Deemed to be University, 613401, Thanjavur, Tamil Nadu, India
| | - R. Venkatraman
- School of Mechanical Engineering, SASTRA Deemed to be University, 613401, Thanjavur, Tamil Nadu, India
| | - S. Raghuraman
- School of Mechanical Engineering, SASTRA Deemed to be University, 613401, Thanjavur, Tamil Nadu, India
| | - P. Manoj Kumar
- Department of Mechanical Engineering, KPR Institute of Engineering and Technology, 641407, Coimbatore, Tamil Nadu, India
| | - Moti Lal Rinawa
- Department of Mechanical Engineering, Government Engineering College, 326023, Jhalawar, Rajasthan, India
| | - Ram Subbiah
- Department of Mechanical Engineering, Gokaraju Rangaraju Institute of Engineering and Technology, 500090, Hyderabad, Telangana, India
| | - B. Arulmurugan
- Department of Mechanical Engineering, KPR Institute of Engineering and Technology, 641407, Coimbatore, Tamil Nadu, India
| | - S. Rajkumar
- Department of Mechanical Engineering, Faculty of Manufacturing, Institute of Technology, Hawassa University, Ethiopia
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