Characterization of Microstructure and Properties of Additively Manufactured Materials under Room and Elevated Temperatures

The utilisation of additive manufacturing (AM) has brought about a significant transformation in the manufacturing process of materials and components, since it allows for the creation of complex geometries and customised designs. The primary objective of this study is to conduct a thorough analysis of the microstructure and characteristics of materials produced by additive manufacturing techniques, including the effects of varying temperatures ranging from ambient temperature to increased levels. Microstructural analysis encompasses several methods, including optical microscopy, scanning electron microscopy (SEM), and X-ray diffraction (XRD), which are employed to investigate the grain structure, porosity, and phase composition. Standardised testing procedures are employed to assess mechanical qualities, such as tensile strength, hardness, and fracture toughness. temperature analysis methods, such as differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), are utilised in order to examine the temperature stability and phase transitions. This study investigates the impact of various printing factors, including layer thickness, printing speed, and build orientation, on the resultant microstructure and characteristics. This study aims to address the disparity between theoretical understanding and actual implementation, therefore facilitating the wider use of additively made materials in businesses that need exceptional performance in many environments

Investigation of Microstructure and Mechanical Properties of High-Temperature Super Alloy under Room and Elevated Temperature

This research investigates the microstructural characteristics and mechanical properties of a high-temperature superalloy under different temperature settings. The objective of this study is to analyse the alloy’s reaction to thermal stress, with a specific focus on both room and increased temperatures. By employing sophisticated microscopy techniques, researchers are able to closely examine the development of microstructural characteristics, which provides valuable understanding of phase changes and the dynamics of grains. Simultaneously, evaluations of mechanical properties, including tensile strength, hardness, and resilience, offer a holistic comprehension of the alloy’s operational characteristics. This research enhances the overall understanding of the alloy’s appropriateness for high-temperature applications by considering a wide range of temperatures. The results not only contribute to our fundamental understanding of materials science but also have ramifications for the development of alloys that can endure severe heat conditions

In vitro screening of dry fruit extracts of Piper attenuatum for antioxidant and anticancer activity

Indian traditional medicinal plant Piper attenuatum (Buch-Ham) has been investigated for its antioxidant and anticancer activity. Three extracts were prepared using ethyl acetate, ethanol and methanol. In vitro antioxidant activity was performed by ABTS {2,2′-azino-bis(3-ethylbenzothiazoline-6- sulphonic acid)} free radical scavenging method. All three extracts reduced the free radicals produced by ABTS in a concentration-dependent manner which could be compared to the standard (gallic acid). Invitro anticancer activity of all extracts was carried out by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5- diphenyltetrazolium bromide) assay method against MCF7 (Michigan Cancer Foundation-7) cell lines. None of the extract showed anticancer activity when compared with the standard (mitomycin C) indicating that P. attenuatum is deprived of antiproliferative or cytotoxic components

Abstracts of National Conference on Research and Developments in Material Processing, Modelling and Characterization 2020

This book presents the abstracts of the papers presented to the Online National Conference on Research and Developments in Material Processing, Modelling and Characterization 2020 (RDMPMC-2020) held on 26th and 27th August 2020 organized by the Department of Metallurgical and Materials Science in Association with the Department of Production and Industrial Engineering, National Institute of Technology Jamshedpur, Jharkhand, India. Conference Title: National Conference on Research and Developments in Material Processing, Modelling and Characterization 2020Conference Acronym: RDMPMC-2020Conference Date: 26–27 August 2020Conference Location: Online (Virtual Mode)Conference Organizer: Department of Metallurgical and Materials Engineering, National Institute of Technology JamshedpurCo-organizer: Department of Production and Industrial Engineering, National Institute of Technology Jamshedpur, Jharkhand, IndiaConference Sponsor: TEQIP-

30-Day morbidity and mortality of bariatric metabolic surgery in adolescence during the COVID-19 pandemic – The GENEVA study

Background: Metabolic and bariatric surgery (MBS) is an effective treatment for adolescents with severe obesity. Objectives: This study examined the safety of MBS in adolescents during the coronavirus disease 2019 (COVID-19) pandemic. Methods: This was a global, multicentre and observational cohort study of MBS performed between May 01, 2020, and October 10,2020, in 68 centres from 24 countries. Data collection included in-hospital and 30-day COVID-19 and surgery-specific morbidity/mortality. Results: One hundred and seventy adolescent patients (mean age: 17.75 ± 1.30 years), mostly females (n = 122, 71.8%), underwent MBS during the study period. The mean pre-operative weight and body mass index were 122.16 ± 15.92 kg and 43.7 ± 7.11 kg/m2, respectively. Although majority of patients had pre-operative testing for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) (n = 146; 85.9%), only 42.4% (n = 72) of the patients were asked to self-isolate pre-operatively. Two patients developed symptomatic SARS-CoV-2 infection post-operatively (1.2%). The overall complication rate was 5.3% (n = 9). There was no mortality in this cohort. Conclusions: MBS in adolescents with obesity is safe during the COVID-19 pandemic when performed within the context of local precautionary procedures (such as pre-operative testing). The 30-day morbidity rates were similar to those reported pre-pandemic. These data will help facilitate the safe re-introduction of MBS services for this group of patients