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Effect of fusion welding processes on tensile properties of armor grade, high thickness, non-heat treatable aluminium alloy joints

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Defence Technology（防务技术） 2019年第3期15卷 353-362页

作者： K. Vasu H. Chelladurai Addanki Ramaswamy s. malarvizhi V. Balasubramanian Department of Mechanical Engineering PDPM Indian Institute of Information Technology Design and Manufacturing Jabalpur Madhya pradesh 482005 India Centre for Materials Joining & Research (CEMAJOR) Department of Manufacturing Engineering Annamalai University Annamalai Nagar -(P.O) Tamil nadu 608002 India

AA5059 is one of the high strength armor grade aluminium alloy that finds its applications in the military vehicles due to the higher resistance against the armor piercing (AP) threats. This study aimed at finding the best suitable process among the fusion welding processes such as gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW) by evaluating the tensile properties of AA5059 aluminium alloy joints. The fracture path was identified by mapping the low hardness distribution profile (LHDP) across the weld cross section under tensile loading. Optical and scanning electron microscopies were used to characterize the microstructural features of the welded joints at various zones. It is evident from the results that GTAW joints showed superior tensile properties compared to GMAW joints and this is primarily owing to the presence of finer grains in the weld metal zone (WMZ) and narrow heat-affected zone (HAZ). The lower heat input associated with the GTAW process effectively reduced the size of the WMZ and HAZ compared to GMAW process. Lower heat input of GTAW process results in faster cooling rate which hinders the grain growth and reduces the evaporation of magnesium in weld metal compared to GMAW joints. The fracture surface of GTAW joint consists of more dimples than GMAW joints which is an indication that the GTAW joint possess improved ductility than GMAW joint.

关键词： Gas tungsten arc welding Gas metal arc welding Armor grade aluminium alloy Tensile properties Microhardness

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Developing friction stir welding window for AA2219 aluminium alloy

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Transactions of Nonferrous Metals society of China 2011年第11期21卷 2339-2347页

作者： A. K. LAKsHMINARAYANAN s. malarvizhi V. BALAsUBRAMANIAN Centre for Materials Joining & Research (CEMAJOR) Department of Manufacturing Engineering Annamalai University

A friction stir welding window was developed for effective joining of AA2219 aluminium alloy. Joints were fabricated using different combination of process parameters such as rotational speed and welding speed. Based on macrostructural analysis, the friction stir welding window was constructed. The strength values of joints at different regions of friction stir welding window were analyzed using tensile properties, microstructural studies, and the fracture location of joints was correlated with the lowest hardness distribution profiles. These windows will act as reference maps for selecting appropriate friction stir welding process parameters to get good quality welds of AA2219 aluminium alloys.

关键词： friction stir welding window aluminium alloy lowest hardness distribution profile tensile strength

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Nesting Biology and site selection of Olive Ridley—A Coherence of Nature

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Open Journal of Marine science 2023年第2期13卷 29-39页

作者： Arun malarvizhi P. M. Mohan Department of Ocean studies and Marine Biology Pondicherry University of Campus Port Blai India

Nesting behaviour of sea turtles remains a subject to study, due to their enigmatic pattern of seasonal breeding activities. In the present study, characteristics of the breeding turtle, Olive Ridley (Lepidochelys olivacea) at Ramnagar along N-E coast of North Andaman Islands were investigated, for the nesting periods 2016-2017. Olive Ridley is the dominant sea turtles, with more than 300 individuals nesting every season with at least a 75% hatching success rate. It is one of the conducive, highly protective and undisturbed nesting sites for Olive Ridley on North Andaman coast. In the present study an initiative is made, to identify nature’s cues and the biological characteristics of Olive Ridley, which leads it to nest at Ramnagar beach, with a high hatchling success rate.

关键词： sea Turtle Olive Ridley Ramnagar Beach Nesting Beach sand Grain Hatch-ling North Andaman

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The Probable Cause for Nesting Pattern of Olive Ridley (Lepidochelys olivacea) at Ramnagar Beach, North East Coast of Andaman Island, India

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Open Journal of Marine science 2023年第1期13卷 7-27页

作者： Arun malarvizhi M. M. Ilaamurughu P. M. Mohan Department of Ocean studies and Marine Biology Pondicherry University Off Campus Port Blair Andaman and Nicobar Islands India

The nesting behaviour of sea turtles remains a subject to study, due to their enigmatic pattern of seasonal breeding activities. Over a period of time, several reports have been made in this context associated with the nesting behaviour of the Olive Ridley turtles. In the present study, characteristics of the breeding beach and nesting pattern of Olive Ridley (Lepidochelys olivacea) at Ramnagar along N-E coast of Andaman Islands were investigated, during the nesting periods 2016-2017. The study area hosts Olive Ridley, the dominant sea turtles with more than 300 individuals nesting each year. For this study, the number of sea turtles visited, nested, the sediment characters, salinity, and temperature were taken. The exposed sandy nesting beach characteristics are prone to varying degrees of morphological changes every day. The results depict that even though similar grain size (Coarse sand to Fine sand and Very well sorted to Poorly sorted), with an ambient incubating temperature, pH and salinity with wide nesting area, the selective nesting in the particular location of the beach identified because of comfortable energy conditions in the waters (1.5 m/s) favours the female turtles to reach the beach at the preferable site of Ramnagar and nest.

关键词： sea turtle Olive Ridley Ramnagar Beach Nesting Environment Morphological Changes sand Grain Hatchling North Andaman

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Fungal diversity notes 1512–1610: taxonomic and phylogenetic contributions on genera and species of fungal taxa

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Fungal Diversity 2022年第6期117卷 1-272页

作者： Ruvishika s.Jayawardena Kevin D.Hyde song Wang Ya‑Ru sun Nakarin suwannarach Phongeun sysouphanthong Mohamed A.Abdel‑Wahab Faten A.Abdel‑Aziz Pranami D.Abeywickrama Vanessa P.Abreu Alireza Armand AndréAptroot Dan‑Feng Bao Dominik Begerow Jean‑Michel Bellanger Jadson D.P.Bezerra Digvijayini Bundhun Mark s.Calabon Ting Cao Taimy Cantillo João LVRCarvalho Napalai Chaiwan Che‑Chih Chen Régis Courtecuisse Bao‑Kai Cui Ulrike Damm Cvetomir M.Denchev Teodor T.Denchev Chun Y.Deng Bandarupalli Devadatha Nimali Ide silva Lidiane Ados santos Nawal K.Dubey sylvain Dumez Himashi sFerdinandez André L.Firmino Yusufon Gaforov Achala J.Gajanayake Deecksha Gomdola sugantha Gunaseelan shucheng‑He Zin H.Htet malarvizhi Kaliyaperumal Martin Kemler Kezhocuyi Kezo Nuwan DKularathnage Marco Leonardi Ji‑Peng Li Chunfang Liao shun Liu Michael Loizides Thatsanee Luangharn Jian Ma Hugo Madrid s.Mahadevakumar sajeewa s.N.Maharachchikumbura Dimuthu s.Manamgoda María P.Martín Niranjan Mekala Pierre‑Arthur Moreau Yan‑Hong Mu Pasouvang Pahoua Dhandevi Pem Olinto L.Pereira Wiphawanee Phonrob Chayanard Phukhamsakda Mubashar Raza Guang‑Cong Ren Andrea C.Rinaldi Walter Rossi Binu C.samarakoon Milan Csamarakoon Vemuri V.sarma Indunil C.senanayake Archana singh Maria F.souza Cristina M.souza‑Motta Adriano A.spielmann Wenxin su Xia Tang XingGuo Tian Kasun M.Thambugala Naritsada Thongklang Danushka s.Tennakoon Nopparat Wannathes DingPeng Wei stéphane Welti subodini N.Wijesinghe Hongde Yang Yunhui Yang Hai‑sheng Yuan Huang Zhang Jingyi Zhang Abhaya Balasuriya Chitrabhanu sBhunjun Timur s.Bulgakov Lei Cai Erio Camporesi Putarak Chomnunti Y.s.Deepika Mingkwan Doilom Wei‑Jun Duan shi‑Ling Han Naruemon Huanraluek EBGareth Jones NLakshmidevi Yu Li saisamorn Lumyong Zong‑Long Luo surapong Khuna Jaturong Kumla Ishara s.Manawasinghe Ausana Mapook Wilawan Punyaboon saowaluck Tibpromma Yong‑Zhong Lu JiYe Yan Yong Wang Center of Excellence in Fungal Research Mae Fah Luang UniversityChiang Rai 57100Thailand school of science Mae Fah Luang UniversityChiang Rai 57100Thailand Innovative Institute for Plant Health Zhongkai University of Agriculture and EngineeringGuangzhou 510225P.R.China Department of Plant Pathology College of AgricultureGuizhou UniversityGuiyang 550025GuizhouChina Research Center of Microbial Diversity and sustainable Utilization Chiang Mai UniversityChiang Mai 50200Thailand Department of Biology Faculty of ScienceChiang Mai UniversityChiang Mai 50200Thailand Biotechnology and Ecology Institute Ministry of Agriculture and ForestryP.O.Box:811Vientiane CapitalLao PDR Department of Botany and Microbiology Faculty of ScienceSohag UniversitySohag 82524Egypt Beijing Key Laboratory of Environment-Friendly Management on Fruit Diseases and Pests in North China Institute of Plant ProtectionBeijing Academy of Agriculture and Forestry SciencesBeijing 100097China Departamento de Fitopatologia Universidade Federal de ViçosaViçosaMinas GeraisBrazil Laboratório de Botânica/Liquenologia Instituto de BiociênciasUniversidade Federal de Mato Grosso do SulAvenida Costa e Silva S/NBairro UniversitárioCampo GrandeMato Grosso do Sul CEP 79070-900Brazil College of Agriculture and Biological sciences Dali UniversityDali 671003YunnanChina Department of Entomology and Plant Pathology Faculty of AgricultureChiang Mai UniversityChiang Mai 50200Thailand Institute of Plant science and Microbiology Universität HamburgOrganismic Botany and MycologyOhnhorststr.1822609 HamburgGermany CEFE CNRSUniv.MontpellierEPHEIRDINSERM1919Route de Mende34293 Montpellier Cedex 5France setor de Micologia Departamento de Biociências e TecnologiaInstituto de Patologia Tropical e Saúde PúblicaUniversidade Federal de GoiásRua 235S/NSetor UniversitárioGoiâniaGO CEP:74605-050Brazil Division of Biological sciences College of Arts and SciencesUniversity of the Philippines Visayas5023 MiagaoIloiloPhilippines CA

This article is the 14th in the Fungal Diversity Notes series,wherein we report 98 taxa distributed in two phyla,seven classes,26 orders and 50 families which are described and *** in this study were collected from Australia,Brazil,Burkina Faso,Chile,China,Cyprus,Egypt,France,French Guiana,India,Indonesia,Italy,Laos,Mexico,Russia,sri Lanka,Thailand,and *** are 59 new taxa,39 new hosts and new geographical distributions with one new *** 59 new species comprise Angustimassarina kunmingense,Asterina lopi,Asterina brigadeirensis,Bartalinia bidenticola,Bartalinia caryotae,Buellia pruinocalcarea,Coltricia insularis,Colletotrichum fexuosum,Colletotrichum thasutense,Coniochaeta caraganae,Coniothyrium yuccicola,Dematipyriforma aquatic,Dematipyriforma globispora,Dematipyriforma nilotica,Distoseptispora bambusicola,Fulvifomes jawadhuvensis,Fulvifomes malaiyanurensis,Fulvifomes thiruvannamalaiensis,Fusarium purpurea,Gerronema atrovirens,Gerronema favum,Gerronema keralense,Gerronema kuruvense,Grammothele taiwanensis,Hongkongmyces changchunensis,Hypoxylon inaequale,Kirschsteiniothelia acutisporum,Kirschsteiniothelia crustaceum,Kirschsteiniothelia extensum,Kirschsteiniothelia septemseptatum,Kirschsteiniothelia spatiosum,Lecanora immersocalcarea,Lepiota subthailandica,Lindgomyces guizhouensis,Marthe asmius pallidoaurantiacus,Marasmius tangerinus,Neovaginatispora mangiferae,Pararamichloridium aquisubtropicum,Pestalotiopsis piraubensis,Phacidium chinaum,Phaeoisaria goiasensis,Phaeoseptum thailandicum,Pleurothecium aquisubtropicum,Pseudocercospora vernoniae,Pyrenophora verruculosa,Rhachomyces cruralis,Rhachomyces hyperommae,Rhachomyces magrinii,Rhachomyces platyprosophi,Rhizomarasmius cunninghamietorum,skeletocutis cangshanensis,skeletocutis subchrysella,sporisorium anadelphiae-leptocomae,Tetraploa dashaoensis,Tomentella exiguelata,Tomentella fuscoaraneosa,Tricholomopsis lechatii,Vaginatispora favispora and Wetmoreana *** new combin

关键词： 59 New taxa 39 New records Ascomycota Basidiomycota Dothideomycetes Lecanoromycetes Leotiomycetes sordariomycetes Ustilaginomycotina

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Fungal diversity notes 1611-1716: taxonomic and phylogenetic contributions on fungal genera and species emphasis in south China

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Fungal Diversity 2023年第5期122卷 161-403页

作者： Indunil C.senanayake Walter Rossi Marco Leonardi Alex Weir Mark McHugh Kunhiraman C.Rajeshkumar Rajnish K.Verma samantha C.Karunarathna saowaluck Tibpromma Nikhil Ashtekar sreejith K.Ashtamoorthy sanjay Raveendran Gurmeet Kour Aishwarya singh saúl De la Peña-Lastra Antonio Mateos Miroslav Kolařík Vladimír Antonín HanaŠevčíková Fernando Esteve-Raventós Ellen Larsson Fermín Pancorbo Gabriel Moreno Alberto Altés Yolanda Turégano Tian-Ye Du Li Lu Qi-Rui Li Ji-Chuan Kang sugantha Gunaseelan Kezhocuyi Kezo malarvizhi Kaliyaperumal Jizhen Fu Milan C.samarakoon Yusufjon Gafforov shakhnoza Teshaboeva Pradeep C.Kunjan Arya Chamaparambath Adam Flakus Javier Etayo Pamela Rodriguez-Flakus Mikhail P.Zhurbenko Nimali Ide silva Danushka s.Tennakoon KPDeepna Latha Patinjareveettil Manimohan KNAnil Raj Mark s.Calabon Abdollah Ahmadpour Zeinab Heidarian Zahra Alavi Fatemeh Alavi Youbert Ghosta Razmig Azizi Mei Luo Min-Ping Zhao Nuwan D.Kularathnage Li Hua Yun-Hui Yang Chun-Fang Liao Hai-Jun Zhao Anis s.Lestari subashini C.Jayasiri Feng-Ming Yu Lei Lei Jian-Wei Liu Omid Karimi song-Ming Tang Ya-Ru sun Yong Wang Ming Zeng Zin H.Htet Benedetto T.Linaldeddu Artur Alves Alan J.L.Phillips Carlo Bregant Lucio Montecchio AndréDe Kesel Vincent P.Hustad Andrew N.Miller Anna G.Fedosova Viktor Kučera Mubashar Raza Muzammil Hussain Yan-Peng Chen Vinodhini Thiyagaraja Deecksha Gomdola Achala R.Rathnayaka Asha J.Dissanayake Nakarin suwannarach sinang Hongsanan sajeewa s.N.Maharachchikumbura Lakmali s.Dissanayake Nalin N.Wijayawardene Rungtiwa Phookamsak saisamorn Lumyong E.B.Gareth Jones Neelamanie Yapa Dhanushka N.Wanasinghe Ning Xie Mingkwan Doilom Ishara s.Manawasinghe Jian-Kui(Jack)Liu Qi Zhao Biao Xu Kevin D.Hyde Jiage song Innovative Institute for Plant Health/Key Laboratory of Green Prevention and Control On Fruits and Vegetables in south China Ministry of Agriculture and Rural AffairsZhongkai University of Agriculture and EngineeringHaizhu DistrictGuangzhou 510225GuangdongChina Center of Excellence in Fungal Research Mae Fah Luang UniversityChiang Rai 57100Thailand Guangdong Provincial Key Laboratory for Plant Epigenetics College of Life Science and OceanographyShenzhen University3688Nanhai AvenueNanshanShenzhen 518055GuangdongChina sect.Environmental sciences Department MeSVAUniversity of L’AquilaVia Vetoio67100 CoppitoAQItaly Department of Environmental Biology SUNY-ESF241 Illick Hall1 Forestry DriveSyracuseNY 13210USA National Fungal Culture Collection of India MACS Agharkar Research InstitutePuneMaharashtra 411004India Department of Plant Pathology Punjab Agricultural UniversityLudhianaPunjab 141004India Center for Yunnan Plateau Biological Resources Protection and Utilization College of Biological Resource and Food EngineeringQujing Normal UniversityQujing 655011YunnanChina Department of Forest Ecology Kerala Forest Research InstitutePeechiThrissurKerala 680653India Department of Botany The American CollegeTallakkulamMaduraiTamil Nadu 625002India Department of Zoology Savitribai Phule Pune UniversityGaneshkhind RdGaneshkhindPuneMaharashtra 411007India University of santiago de Compostela 15782 Santiago de CompostelaSpain sociedad Micológica Extremeña C/Sagitario 1410001 CáceresSpain Institute of Microbiology of the Czech Academy of sciences Vídeňská108314220 Prague 4Czech Republic Department of Botany Moravian MuseumZelnýtrh 665937 BrnoCzech Republic Department of Life sciences(Botany Unit) University of Alcalá28805 Alcaláde HenaresMadridSpain Biological and Enviromental sciences University of Gothemburgand Gothemburg Global Biodiversity CentreBox 46140530 GöteborgSweden Madrid Mycological society Real Jardín BotánicoC/Claudio Moyano 128014 MadridSpain state Ke

This article is the 15th contribution in the Fungal Diversity Notes series,wherein 115 taxa from three phyla,nine classes,28 orders,48 families,and 64 genera are *** taxa described and illustrated in the present study include a new family,five new genera,61 new species,five new combinations,one synonym,one new variety and 31 records on new hosts or new geographical *** *** introduced and accommodated in *** new genera introduced in this study are Ageratinicola,Kevinia,Pseudomultiseptospora(Parabambusicolaceae),Marasmiellomycena,and Vizzinia(Porotheleaceae).Newly described species are Abrothallus altoandinus,Ageratinicola kunmingensis,Allocryptovalsa aceris,Allophoma yuccae,Apiospora cannae,***,***,Boeremia wisteriae,Calycina papaeana,Clypeo-coccum lichenostigmoides,Coniochaeta riskali-shoyakubovii,Cryphonectria kunmingensis,Diaporthe angustiapiculata,***,***,Diatrypella guangdongense,Dothiorella franceschinii,Endocalyx phoenicis,Epicoc-cum terminosporum,Fulvifomes karaiensis,***,Ganoderma ghatensis,Hysterobrevium baoshanense,Inocybe avellaneorosea,***,Jahnula oblonga,Kevinia lignicola,Kirschsteiniothelia guangdongensis,Laboulbenia caprina,***,***,***,***,***,***,***,***,Laccaria rubriporus,Lasiodiplodia morindae,Lyophyllum agnijum,Marasmiellomycena pseudoomphaliiformis,Melomastia beihaiensis,Nemania guangdongensis,Nigrograna thailandica,Nigrospora ficuum,Oxydothis chinensis,***,Petriella thailandica,Phaeoacremonium chinensis,Phialocephala chinensis,Phytophthora debattistii,Polyplosphaeria nigrospora,Pronectria loweniae,seriascoma acutispora,setoseptoria bambusae,stictis anomianthi,Tarzetta tibetensis,Tarzetta urceolata,Tetraploa obpyriformis,Trichoglossum beninense,and Tricoderma *** provide an emendation for Urnula ailaoshanensis Agaricus duplocingulatoides *** i

关键词： Agaricomycetes Ascomycota Basidiomycota Dothideomycetes Eurotiomycetes Fungal diversity Geoglossomycetes Geographical distribution Host records Incertae sedis Laboulbeniomycetes Lecanoromycetes Leotiomycetes Novel taxa New combination Oomycota Peronosporea Pezizomycetes Phylogeny sordariomycetes south Chinese fungi Taxonomy

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