Effect of powder composition, PTAW parameters on dilution, microstructure and hardness of Ni-Cr-Si-B alloy deposition: Experimental investigation and prediction using machine learning technique. | LitMetric
The implementation of hard-facing alloy on the existing materials caters the need for high-performance surfaces in terms of wear and high temperatures. The present research explore the effect of Plasma Transferred Arc Welding (PTAW) parameters and powder composition on dilution, microstructure and hardness of the commonly used hard-facing alloy Ni-Cr-Si-B powder. The hard-facing alloy was deposited with three weight proportions of boron (2.5 %, 3 % and 3.5 %). The statistical-based Grey Relational Analysis (GRA) followed by a Machine Learning Algorithm (MLA) was implemented to identify the ideal parameters and degree of significance of each parameter and for the prediction of the responses. The dilution percentage, microstructure analysis, and phase detection were estimated through elemental analysis, Scanning electron Microscopy (SEM) and X-ray Diffraction Analysis (XRD) respectively. The experimental and modelling results revealed that 400 mm/min of scanning speed, 8 gm/min of powder delivery, 14 mm of stand-off distance, and 120 A of current were the optimal parameters along with 3.5 wt% of boron powder composition to yield a better dilution, microstructure and hardness.
Objective: In response to increasing hypertension rates, South Africa implemented a regulation which set a maximum total sodium content for certain packaged food categories. We assess changes in reported sodium intake among 18-39 year old adults living in one township in the Western Cape as a result of the implementation of the regulation in 2016.
Design: By linking one set of 24 hour dietary recall data to two versions of the South Africa Food Composition Database which reflect the pre-regulation and post-regulation periods, we calculated changes in sodium intake due to reformulation of food products, not behavior change.
Vincetoxicum capparidifolium (Wight & Arn.) Kuntze [=Tylophora capparidifolia (Wight & Arn.) Kuntze], belonging to the family Apocynaceae, is a medicinal plant species endemic to the southern Western Ghats, Tamil Nadu, India.
Department of Clinical Immuno-Oncology, Clinical Research Institute for Clinical Pharmacology and Therapeutics, Showa University, Tokyo, Japan; Division of Medical Oncology, Department of Medicine, Showa University Graduate School of Medicine, Tokyo, Japan. Electronic address:
Gut bacteria play pivotal roles in the antitumor effects of immune checkpoint inhibitors (ICIs). However, antimicrobial therapy, often necessary for infections in cancer patients, can reduce the efficacy of ICIs. The potential of probiotics to restore ICI efficacy remains uncertain.
Objective: The fatty acid composition and content of different commercial dairy products were analyzed.
Methods: A total of 33 representative dairy products were purchased in the supermarket of Chongqing, which were divided into three types: pure milk, milk powder and yogurt. The composition and content of fatty acids were analyzed by gas chromatography.
Institute of Tissue Regeneration, Soonchunhyang University, Cheonan 31151, Republic of Korea; Department of Surgery, Soonchunhyang University Cheonan Hospital, Cheonan 31151, Republic of Korea.
Although hemostatic powders are commonly used in clinical and emergency settings, they frequently show poor absorption, raise cytotoxicity issues, and are not effective for fatal non-compressible bleeding. The purpose of this research is to create a self-gelling hemostatic powder based on chitosan, bentonite, and sodium polyacrylate (CBS) to improve the hemostatic effect. When liquid comes into contact with CBS powders, they can fuse and form a stable hydrogel in less than 30s.
