{"title":"Digitization in logistics and its effect on sustainability in Nigeria","authors":"Adetayo Olaniyi Adeniran, Gbemileke Tobi Oyeniran, Adedayo Ayomide Adeniran, Muraina Joseph Mosunmola","doi":"10.54905/disssi.v60i334.e15d1420","DOIUrl":"https://doi.org/10.54905/disssi.v60i334.e15d1420","url":null,"abstract":"","PeriodicalId":505009,"journal":{"name":"Discovery","volume":"87 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140670603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-23DOI: 10.54905/disssi.v60i334.e4d1408
Pooja Arora
{"title":"Leaf litter decomposition and nutrient dynamics in tree plantations at Kurukshetra, Haryana, India","authors":"Pooja Arora","doi":"10.54905/disssi.v60i334.e4d1408","DOIUrl":"https://doi.org/10.54905/disssi.v60i334.e4d1408","url":null,"abstract":"","PeriodicalId":505009,"journal":{"name":"Discovery","volume":"28 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140667502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-09DOI: 10.54905/disssi.v59i333.e114d1355
Fagbohunm Griffin Siji
It is not uncommon to see sensor nodes deployed in an uneven or hilly terrain. This can be found in many parts of Nigeria. In the same vain, sensor nodes may be deployed in very hostile areas such as in northern parts of Nigeria where insurgents are heavily present. In areas such as those stated above, the use of unmanned aerial vehicles can be used for energy-efficient data collection from the scattered sensor nodes. Unmanned Aerial Vehicles operating at low altitudes can be used to lower the energy consumption of the wireless sensor network by using an intelligent data collection methodology to distribute the UAVs for data collection from the nodes. This paper proposes an energy-efficient and optimized data aggregation (EEODA) scheme in UAV-assisted wireless sensor network for hilly and uneven terrain is designed, using UAVs as data collection points. This can be achieved through the following steps, firstly, a distributed clustering algorithm based on reinforcement learning was proposed to organize the wireless sensor nodes, secondly, a mono-objective simulated annealing search method will be used to efficiently distribute the UAVs for optimum collection of data from the various cluster heads in the network, thirdly the city section mobility model will be used to compute the optimum position for the UAVs to each of the cluster heads in the network. Simulation results show that EEODA scheme proposed in this paper outperforms the EFDC, the closest-performing algorithm to it with an average of 12%. It also outperforms the other two compared algorithms, LEACH with UAV and HEED with UAV with between 17% and 36%, respectively with performance metrics such as energy consumption of nodes, scalability, delay in data aggregation and collection, control overhead and number of dead nodes in each round of clustering.
{"title":"An improved energy-efficient data clustering in UAV-Aided Wireless Sensor Networks for uneven topology","authors":"Fagbohunm Griffin Siji","doi":"10.54905/disssi.v59i333.e114d1355","DOIUrl":"https://doi.org/10.54905/disssi.v59i333.e114d1355","url":null,"abstract":"It is not uncommon to see sensor nodes deployed in an uneven or hilly terrain. This can be found in many parts of Nigeria. In the same vain, sensor nodes may be deployed in very hostile areas such as in northern parts of Nigeria where insurgents are heavily present. In areas such as those stated above, the use of unmanned aerial vehicles can be used for energy-efficient data collection from the scattered sensor nodes. Unmanned Aerial Vehicles operating at low altitudes can be used to lower the energy consumption of the wireless sensor network by using an intelligent data collection methodology to distribute the UAVs for data collection from the nodes. This paper proposes an energy-efficient and optimized data aggregation (EEODA) scheme in UAV-assisted wireless sensor network for hilly and uneven terrain is designed, using UAVs as data collection points. This can be achieved through the following steps, firstly, a distributed clustering algorithm based on reinforcement learning was proposed to organize the wireless sensor nodes, secondly, a mono-objective simulated annealing search method will be used to efficiently distribute the UAVs for optimum collection of data from the various cluster heads in the network, thirdly the city section mobility model will be used to compute the optimum position for the UAVs to each of the cluster heads in the network. Simulation results show that EEODA scheme proposed in this paper outperforms the EFDC, the closest-performing algorithm to it with an average of 12%. It also outperforms the other two compared algorithms, LEACH with UAV and HEED with UAV with between 17% and 36%, respectively with performance metrics such as energy consumption of nodes, scalability, delay in data aggregation and collection, control overhead and number of dead nodes in each round of clustering.","PeriodicalId":505009,"journal":{"name":"Discovery","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139184739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-09DOI: 10.54905/disssi.v59i333.e117d1359
Lal Mani Pokhrel
The internet, a vast global network of interconnected computers, has become an indispensable tool for information access and communication. This study examines the effects of internet addiction on the social lives of bachelor's level students in Nepalgunj. It explores students' attitudes toward interpersonal relationships and self-confidence in self-presentation. While the internet plays a crucial role in enhancing students' global awareness and knowledge, excessive dependence on it can undermine their self-assurance. Data for this study was collected through an online questionnaire distributed via platforms like Google Forms on social media. The findings reveal that 35% of students stay up late to complete college assignments, while 5% do so for family discussions. Additionally, 53% stay awake late primarily for internet browsing, with 7% citing other reasons for their nocturnal activities. The report concludes that excessive internet usage has a negative impact on students' self-assurance, interpersonal skills, and creativity. This dependence hinders social engagement and undermines their ability to participate in face-to-face interactions confidently. Furthermore, internet addiction limits students' creativity, fostering an overreliance on the internet for problem-solving.
{"title":"Internet addiction's impact on bachelor students' social lives","authors":"Lal Mani Pokhrel","doi":"10.54905/disssi.v59i333.e117d1359","DOIUrl":"https://doi.org/10.54905/disssi.v59i333.e117d1359","url":null,"abstract":"The internet, a vast global network of interconnected computers, has become an indispensable tool for information access and communication. This study examines the effects of internet addiction on the social lives of bachelor's level students in Nepalgunj. It explores students' attitudes toward interpersonal relationships and self-confidence in self-presentation. While the internet plays a crucial role in enhancing students' global awareness and knowledge, excessive dependence on it can undermine their self-assurance. Data for this study was collected through an online questionnaire distributed via platforms like Google Forms on social media. The findings reveal that 35% of students stay up late to complete college assignments, while 5% do so for family discussions. Additionally, 53% stay awake late primarily for internet browsing, with 7% citing other reasons for their nocturnal activities. The report concludes that excessive internet usage has a negative impact on students' self-assurance, interpersonal skills, and creativity. This dependence hinders social engagement and undermines their ability to participate in face-to-face interactions confidently. Furthermore, internet addiction limits students' creativity, fostering an overreliance on the internet for problem-solving.","PeriodicalId":505009,"journal":{"name":"Discovery","volume":"31 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139184774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-09DOI: 10.54905/disssi.v59i333.e109d1353
Nabajit Mondal, Anirban Ghosh
Increasing demand for food induces the human population to use excessive fertilizers in agricultural practices. A large quantity of Nitrogen fertilizer is used in agricultural fields compared with phosphate and potassium fertilizers, and unabsorbed excess accumulates in water bodies. Nitrogen-based fertilizers are degraded into ammonia and ammonium ions, which are toxic for fish. The gills and skin of fish are the primary sites of toxic exposure, and through gills, ammonia enters into the fish's bloodstream and reaches different organs and tissues. Ammonia exposure to fish has evidence to damage the fish's red blood cells as well as blood stem cells or hematopoietic stem cells in the liver and head-kidney, which are the major fish organs and showed tissue-specific toxicity. Unionized forms of ammonia can efficiently cross cell membranes and exert more toxicity. Ammonia exposure showed oxidative damage, i.e., lipid peroxidation, protein and DNA denaturation and stress hormone-mediated toxicity, which in turn affect the immune system. Ammonia toxicity disrupts the glutamine metabolic pathway, thereby causing cellular proliferation and death, which is associated with an inflammatory response; mediated through inflammatory cytokines like IL-1, IL-8, and TNF release in exposed fish. Present review deals with such lethal impacts of ammonia on fish health, where we are concerned as the direct consumer of fish and fish products.
对粮食需求的不断增长促使人类在农业生产中过量使用化肥。与磷肥和钾肥相比，农田使用了大量氮肥，未被吸收的多余氮肥在水体中积累。氮基化肥会降解为氨和铵离子，对鱼类有毒。鱼类的鳃和皮肤是接触有毒物质的主要部位，氨通过鳃进入鱼类的血液，到达不同的器官和组织。有证据表明，鱼类接触氨会损害鱼类的红细胞以及肝脏和头肾中的造血干细胞或造血干细胞，而肝脏和头肾是鱼类的主要器官，并显示出组织特异性毒性。氨的联合形式可以有效地穿过细胞膜，产生更大的毒性。接触氨后会出现氧化损伤，即脂质过氧化、蛋白质和 DNA 变性以及应激激素介导的毒性，进而影响免疫系统。氨毒性破坏了谷氨酰胺代谢途径，从而导致细胞增殖和死亡，这与炎症反应有关；通过炎症细胞因子，如 IL-1、IL-8 和 TNF 的释放，在暴露的鱼体内介导炎症反应。本综述涉及氨对鱼类健康的致命影响，而我们是鱼类和鱼类产品的直接消费者。
{"title":"Effects of Nitrogen-based fertilizers on fish health: Evaluation of stress factors and immune response","authors":"Nabajit Mondal, Anirban Ghosh","doi":"10.54905/disssi.v59i333.e109d1353","DOIUrl":"https://doi.org/10.54905/disssi.v59i333.e109d1353","url":null,"abstract":"Increasing demand for food induces the human population to use excessive fertilizers in agricultural practices. A large quantity of Nitrogen fertilizer is used in agricultural fields compared with phosphate and potassium fertilizers, and unabsorbed excess accumulates in water bodies. Nitrogen-based fertilizers are degraded into ammonia and ammonium ions, which are toxic for fish. The gills and skin of fish are the primary sites of toxic exposure, and through gills, ammonia enters into the fish's bloodstream and reaches different organs and tissues. Ammonia exposure to fish has evidence to damage the fish's red blood cells as well as blood stem cells or hematopoietic stem cells in the liver and head-kidney, which are the major fish organs and showed tissue-specific toxicity. Unionized forms of ammonia can efficiently cross cell membranes and exert more toxicity. Ammonia exposure showed oxidative damage, i.e., lipid peroxidation, protein and DNA denaturation and stress hormone-mediated toxicity, which in turn affect the immune system. Ammonia toxicity disrupts the glutamine metabolic pathway, thereby causing cellular proliferation and death, which is associated with an inflammatory response; mediated through inflammatory cytokines like IL-1, IL-8, and TNF release in exposed fish. Present review deals with such lethal impacts of ammonia on fish health, where we are concerned as the direct consumer of fish and fish products.","PeriodicalId":505009,"journal":{"name":"Discovery","volume":"22 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139184847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-09DOI: 10.54905/disssi.v59i333.e107d1311
Faci Nd, Amaghionyeodiwe Ca, Obi Ai, Yawas D
{"title":"Inhibition of corrosion of low carbon steel in using the bark and root extracts of Acacia nilotica: Thermodynamic, electrochemical and phytochemical evaluation","authors":"Faci Nd, Amaghionyeodiwe Ca, Obi Ai, Yawas D","doi":"10.54905/disssi.v59i333.e107d1311","DOIUrl":"https://doi.org/10.54905/disssi.v59i333.e107d1311","url":null,"abstract":"","PeriodicalId":505009,"journal":{"name":"Discovery","volume":"53 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139184705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-09DOI: 10.54905/disssi.v59i333.e120d1364
MD Faisal Alam, Jahan Boksh Moral
This study delves into the intricate realm of adolescent dietary behaviors, driven primarily by the pervasive influence of media. Adolescent, known for their susceptibility to media-driven preferences, exhibit complex processes in adapting and selecting their diets. By Employing a survey-based methodology, this research uncovers the profound sway of media on adolescent dietary preferences attributed to individual behavioral determinants. Adolescents gravitate towards familiar, gustatorily pleasing foods, aligning preferences with peers and media personas. Maternal guidance endorsing traditional cuisine while cautioning against foreign foods significantly impacts their choices. Paradoxically, despite occasional discomfort, adolescent favor fast food, especially females. This study underscores the imperative nature of dietary management strategies promoting diversity and social influences in shaping adolescent culinary preferences, highlighting the importance of wholesome food consumption for their nutritional well-being and quality of life.
{"title":"Exploring media-driven dynamics of Adolescent Dietary Behavior: An in-depth analysis of food choice patterns and influences","authors":"MD Faisal Alam, Jahan Boksh Moral","doi":"10.54905/disssi.v59i333.e120d1364","DOIUrl":"https://doi.org/10.54905/disssi.v59i333.e120d1364","url":null,"abstract":"This study delves into the intricate realm of adolescent dietary behaviors, driven primarily by the pervasive influence of media. Adolescent, known for their susceptibility to media-driven preferences, exhibit complex processes in adapting and selecting their diets. By Employing a survey-based methodology, this research uncovers the profound sway of media on adolescent dietary preferences attributed to individual behavioral determinants. Adolescents gravitate towards familiar, gustatorily pleasing foods, aligning preferences with peers and media personas. Maternal guidance endorsing traditional cuisine while cautioning against foreign foods significantly impacts their choices. Paradoxically, despite occasional discomfort, adolescent favor fast food, especially females. This study underscores the imperative nature of dietary management strategies promoting diversity and social influences in shaping adolescent culinary preferences, highlighting the importance of wholesome food consumption for their nutritional well-being and quality of life.","PeriodicalId":505009,"journal":{"name":"Discovery","volume":"12 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139184719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-09DOI: 10.54905/disssi.v59i333.e110d1352
Lal Babu Sah Telee, Ram Suresh Yadav, Vijay Kumar
Here, a new distribution having three called Modified Inverse Lomax Distribution is proposed. Important statistical properties like the survival, hazard rate, the probability density function (PDF) is studied. Least Square, Cramer-Von Mises and Maximum Likelihood estimation methods are used for estimation of parameters using R programming software. A data set is discussed and performed the goodness-of-fit to assess the application of the proposed distribution. Various methods of model comparison and model validation are also used. The proposed model called Modified Inverse Lomax Distribution is more applicable as compared to some existing probability model.
在此，我们提出了一种新的分布，有三个称为修正的反洛马克斯分布（Modified Inverse Lomax Distribution）。研究了生存率、危险率、概率密度函数（PDF）等重要统计特性。使用 R 编程软件，采用最小平方、Cramer-Von Mises 和最大似然估计方法来估计参数。讨论了一组数据，并对拟合优度进行了测试，以评估拟议分布的应用。还使用了各种模型比较和模型验证方法。与现有的一些概率模型相比，所提出的名为 "修正的逆洛马克斯分布 "的模型更加适用。
{"title":"Modified Inverse Lomax Distribution: Model and properties","authors":"Lal Babu Sah Telee, Ram Suresh Yadav, Vijay Kumar","doi":"10.54905/disssi.v59i333.e110d1352","DOIUrl":"https://doi.org/10.54905/disssi.v59i333.e110d1352","url":null,"abstract":"Here, a new distribution having three called Modified Inverse Lomax Distribution is proposed. Important statistical properties like the survival, hazard rate, the probability density function (PDF) is studied. Least Square, Cramer-Von Mises and Maximum Likelihood estimation methods are used for estimation of parameters using R programming software. A data set is discussed and performed the goodness-of-fit to assess the application of the proposed distribution. Various methods of model comparison and model validation are also used. The proposed model called Modified Inverse Lomax Distribution is more applicable as compared to some existing probability model.","PeriodicalId":505009,"journal":{"name":"Discovery","volume":"10 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139184889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-09DOI: 10.54905/disssi.v59i333.e118d1358
S. Mallick, Asif Hossain, Srimanta Kumar Raut
Pteropus medius roost in the open in trees. They are susceptible to attack by different predators and competing species. Roosting bats produce alarm calls in response to perceived danger. To assess anti-predator behaviors to watch the arrival of enemies, in these bats, we collected data on the directions roosting bats faced in two roost trees in West Bengal, India. It is revealed that the bats, irrespective of roost spots, are accustomed to maintaining the hanging posture facing all direction though out the day. These differences in hanging poses were statistically significant (P<0.05). We hypothesized that such orientation in hanging stance is the induced impact of anti-predator behavior to ensure vigil in all directions.
{"title":"Roost-Colony protection strategy from raiding by enemies in the Indian Flying Fox Pteropus medius (Temminck, 1825)","authors":"S. Mallick, Asif Hossain, Srimanta Kumar Raut","doi":"10.54905/disssi.v59i333.e118d1358","DOIUrl":"https://doi.org/10.54905/disssi.v59i333.e118d1358","url":null,"abstract":"Pteropus medius roost in the open in trees. They are susceptible to attack by different predators and competing species. Roosting bats produce alarm calls in response to perceived danger. To assess anti-predator behaviors to watch the arrival of enemies, in these bats, we collected data on the directions roosting bats faced in two roost trees in West Bengal, India. It is revealed that the bats, irrespective of roost spots, are accustomed to maintaining the hanging posture facing all direction though out the day. These differences in hanging poses were statistically significant (P<0.05). We hypothesized that such orientation in hanging stance is the induced impact of anti-predator behavior to ensure vigil in all directions.","PeriodicalId":505009,"journal":{"name":"Discovery","volume":"9 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139184778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-09DOI: 10.54905/disssi.v59i333.e122d1378
Isiaka Oluwole Oladele, Samuel Olumide Falana, Wasiu Agboladuro Alatishe, Linus Nnubuike Onuh, Samson Oluwagbenga Adelani, Oluwatosin Johnson Ajala
This research study makes fundamental observations about dissimilar metal-welded joints, which combine mild steel and aluminum alloy plates, both 6 mm thick. We joined this metal using the shielded metal arc welding (SMAW) process with E308L-16 as the filler metal. We conducted welding on prepared double-V and butt joints and assessed mechanical properties through tensile, impact, and hardness tests. We examined microstructural characteristics using an optical microscope. To investigate the corrosion behavior, we immersed the welded joint in a 3.5 wt% NaCl solution and analyzed it using the potentiodynamic polarization electrochemical method. The results showed that dissimilar weld joints in the double-V configuration outperformed butt joints in tensile and hardness properties. Moreover, the double-V joint displayed more excellent thermodynamic stability in the 3.5 wt% NaCl solution compared to the commonly used butt joint. Consequently, the double-V joint design is the most suitable choice for achieving optimal mechanical and corrosion characteristics in these dissimilar weld joints for engineering applications.
本研究对异种金属焊接接头进行了基本观察，该接头由厚度均为 6 毫米的低碳钢板和铝合金板组成。我们使用 E308L-16 作为填充金属，采用金属保护电弧焊（SMAW）工艺焊接这种金属。我们对准备好的双 V 形接头和对接接头进行了焊接，并通过拉伸、冲击和硬度测试评估了机械性能。我们使用光学显微镜检查了微观结构特征。为了研究腐蚀行为，我们将焊接接头浸入 3.5 wt% 的氯化钠溶液中，并使用电位极化电化学方法进行分析。结果表明，双 V 形异种焊接接头的拉伸和硬度性能优于对接接头。此外，与常用的对接接头相比，双 V 形接头在 3.5 wt% 的 NaCl 溶液中显示出更出色的热力学稳定性。因此，双 V 形接头设计是工程应用中这些异种焊接接头获得最佳机械和腐蚀特性的最合适选择。
{"title":"Influence of weld joint design on mechanical and corrosion properties of welded dissimilar metals","authors":"Isiaka Oluwole Oladele, Samuel Olumide Falana, Wasiu Agboladuro Alatishe, Linus Nnubuike Onuh, Samson Oluwagbenga Adelani, Oluwatosin Johnson Ajala","doi":"10.54905/disssi.v59i333.e122d1378","DOIUrl":"https://doi.org/10.54905/disssi.v59i333.e122d1378","url":null,"abstract":"This research study makes fundamental observations about dissimilar metal-welded joints, which combine mild steel and aluminum alloy plates, both 6 mm thick. We joined this metal using the shielded metal arc welding (SMAW) process with E308L-16 as the filler metal. We conducted welding on prepared double-V and butt joints and assessed mechanical properties through tensile, impact, and hardness tests. We examined microstructural characteristics using an optical microscope. To investigate the corrosion behavior, we immersed the welded joint in a 3.5 wt% NaCl solution and analyzed it using the potentiodynamic polarization electrochemical method. The results showed that dissimilar weld joints in the double-V configuration outperformed butt joints in tensile and hardness properties. Moreover, the double-V joint displayed more excellent thermodynamic stability in the 3.5 wt% NaCl solution compared to the commonly used butt joint. Consequently, the double-V joint design is the most suitable choice for achieving optimal mechanical and corrosion characteristics in these dissimilar weld joints for engineering applications.","PeriodicalId":505009,"journal":{"name":"Discovery","volume":"26 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139184828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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