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Microstructure and Mechanical Properties of Hyper-Interfacial Bonded Joints of Ultra-Fine Grained High Strength Steels Kazutoshi Nishimoto1, Kazuyoshi Saida2 and Boyoung Jeong3 1 Department of Manufacturing Science, Graduate School of Engineering, Osaka University 2-1 Yamada-oka, Suita, Osaka 565-0871 Japan, nisimoto@mapse.eng.osaka-u.ac.jp 2 ibid., saida@mapse.eng.osaka-u.ac.jp 3 ibid., boyoung@mapse.eng.osaka-u.ac.jp Keywords : Hyper-interfacial bonding, Fusion welding, Ultra-fine grained steels, Microstructure, Hardening/softening, Grain growth, Tensile properties, Impact absorbed energy Abstract.
On the other hand, from a practical viewpoint, welding and joining techniques for the UFG steel are indispensable for being used it as structural materials.
However, the material properties of the heat affected zone (HAZ) in the UFG steel weldment fall down less than the base metal due to the grain growth and softening by weld heat input.
Materials and experimental procedures The chemical composition of the UFG steel used in this study is shown in Table 1.
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Introduction Sulfate slag namely pyrite cinder, was the waste residue discharged from chemical plant in the production of sulfuric acid using sulfuric acid pyrite as raw material[1].
Materials and Methods Materials.
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Dave2, 4 , Lifeng Xu3, 4 , and Xiankai Sun3,4 1 Department of Materials Science and Engineering, 2 Department of Bioengineering, University of Texas at Arlington, TX 76019, USA 3 Department of Radiology, 4Advanced Imaging Research Center, University of Texas Southwestern Medical Center at Dallas, TX 75390, USA a yhao@uta.edu (corresponding author) Received: March 19, 2010; accepted: March 29, 2010 Keywords: Gold Nanoparticles, Cancer imaging, SERS, Cytotoxicity.
We thank the Characterization Center for Materials and Biology (CCMB) at University of Texas at Arlington for providing financial and technical support for the electron microscopic characterization of the nanoparticles.
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In this work, we use graphene as base material, AuPd nanoparticles are electrodeposited on the surface of graphene by a co-deposition method from a mixture of HAuCl4 and HPdCl4 to parepared the AuPd/GR/GCE.
Acknowledgment The authors acknowledge the financial support from the National Natural Science Foundation of China (21075096, 21275113).
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Experiment Materials Polypyrrole synthesis In the polymerization process of polypyrrole, these chemicals were used: pyrrole (Fluka) as a monomer, ammoniumpersulfate (MERCK) as an oxidant, 5-sulfosalicylic acid (Fluka) as a dopant.
In order to the diffusion coefficients are calculated from Higuchi's equation [5]: ( ) 2/1 0 /2 πDtCQ = (1) where Q is the amount of material flowing through a unit cross-section of barrier in unit time, C0 is the initial drug concentration in the hydrogel, D is the diffusion coefficient of a drug and the release time.
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Material and Methods Material Strain Used for Testing.
Acknowledgement This study was supported by youth Scientific Reseach Fundation of Central South University of Forestry and Technology(2009001A);Hunan Provincial Science and Technology Major Project (2011FJ1006).
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Furthermore, the addition of small amounts of Al and Si constituents to the nanocomposite structure of these materials considerably improved their tribological and anti-corrosive properties at operating temperatures exceeding 400 °C, such as hardness and wear resistance, thermal stability and denitrification temperatures [4].
The NSC film-samples showed foremost a positive skin effect up to a penetration depth of about 500 nm while bulk steel substrate in the same indentation depth-range of 12 – 500 nm demonstrated convincingly a negative skin effect or normal indentation size effect (ISE) that is characteristic for bulk material samples.
Acknowledgements This research is funded by the Latvian Council of Science, project No. 2019/1-0385 “Carbon-rich self-healing multifunctional nanostructured smart coatings (NSC) for high-tech applications using high-power confined plasma technology for their deposition”.
Bajajb, A critical review of diamond like carbon coating for wear resistance applications, International Journal of Refractory Metals & Hard Materials. 78 (2019)107-122

As a result, maximum material utilization with a minimum specific energy weight per finished part weight is possible using cold forming [5].
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Bodenmüller, A study on the performance of environmentally benign lubricants at elevated temperatures in bulk metal forming, Journal of Manufacturing Processes 20 (2) (2015) 425–430