Vol 11 Issue 1 April 2023-September 2023

Abstract: Cu-Be alloys are known for their outstanding strength, hardness, and electrical conductivity. They are often used in applications where high performance is required, such as aerospace, electronics, and telecommunications. One significant drawback of Cu-Be alloys is that beryllium is toxic and poses health risks, especially during the manufacturing and machining processes. This has led to concerns about worker safety and environmental impact. In this study, novel Cu-Si-Mo ternary alloys composition with improved tensile strength, ductility, and hardness are produced. The Cu-3Si-xMo (x: 0.1-5 wt%) alloys were fabricated via stir-casting technique. The surface morphologies of the Cu-Si and Cu-Si-Mo alloys were investigated and linked with the mechanical properties using optical metallurgical microscope (OM). Results of the study indicated that tensile strength, ductility, and hardness of the parent alloy improved significantly, recording maximum values of 130 MPa, 18.4%, and 192 BHN, respectively. Alloy with composition; Cu-3Si-1.5Mo gave the best mechanical properties, owing to increased solid solution strengthening, modification, and refinement of the dendritic grains by molybdenum addition.

Keywords: Strength, hardness; morphology; Cu-Si-Mo alloy; composition.

Title: Improving the structure, tensile strength and hardness of molybdenum-doped copper-silicon alloy system

Author: Agatha Ifeoma Ijomah, Kingsley Chidi Nnakwo, Jerome Ugwu Odo, Ifeanacho Uchenna Okeke

International Journal of Mechanical and Industrial Technology      

ISSN 2348-7593 (Online)

Vol. 11, Issue 1, April 2023 - September 2023

Page No: 54-59

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Published Date: 15-September-2023

Abstract: This study investigated the effects of carbide forming elements (manganese and tungsten) and solid solution heat treatment on the microstructure, tensile strength, hardness, and percentage elongation of copper-silicon binary alloys. The response of Cu-3Si-W and Cu-3Si-3Mn alloys on solid solution heat treatment was explored. The alloys compositions were designed and fabricated using stir-casting method. The cast samples were solution heat treated at 900^oC for 5 h and prepared for tensile strength and hardness tests. The microstructure of the as-cast and solution heat treated samples was analyzed and linked with the change in the mechanical properties, using an optical microscope (OM). The microstructure analysis revealed even distributions of fine grains in the copper matrix. The solution heat treated samples showed finer grains which led to improvements of both ultimate tensile strength and hardness of Cu-3Si-W and Cu-3Si-3Mn alloys. The Cu-3Si-W alloys recorded maximum ultimate tensile strength and hardness of 298 MPaand 364 BHN, respectively after solid solution treatment. The solution heat treated Cu-3Si-3Mn alloys recorded maximum ultimate tensile strength of 385 MPa and 390 BHN. The percentage elongation of each alloys decreased after undergoing solid solution treatment. 

Keywords: Tungsten; manganese; carbide formers; microstructure; solid solution strengthening.

Title: Evaluation of solid solution strengthening of copper-silicon binary alloys by carbide forming elements

Author: Agatha Ifeoma Ijomah, Kingsley Chidi Nnakwo, Nkem Emelike Nwankwo, Ifeanacho Uchenna Okeke

International Journal of Mechanical and Industrial Technology      

ISSN 2348-7593 (Online)

Vol. 11, Issue 1, April 2023 - September 2023

Page No: 48-53

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Website: www.researchpublish.com

Published Date: 15-September-2023

Abstract: Design deficiency is one of the most common causes of project failures, resulting in significant financial losses, delays, and safety hazards. This paper aims to explore the causes and impact of design deficiencies on projects, and to provide recommendations for mitigating these risks.

The paper first defines design deficiencies and provides examples of their types and sources, such as inadequate or incomplete specifications, lack of stakeholder involvement, and poor communication between designers and other project stakeholders. The paper then discusses the impact of design deficiencies on project performance, including increased costs, schedule overruns, and rework, as well as safety and quality issues.

To mitigate the risks of design deficiencies, the paper recommends several best practices, such as involving stakeholders early in the design process, conducting thorough reviews and assessments of design documents, and using advanced design tools and technologies to improve communication and collaboration among project team members.

The paper also highlights the importance of project management practices in preventing and addressing design deficiencies, such as risk management, change management, and quality assurance. Finally, the paper concludes with a call to action for project stakeholders to prioritize design quality and invest in effective design processes and practices to ensure project success.

Keywords: Design deficiency, project failures, project failures, project team members.

Title: CAUSES AND IMPACTS OF DESIGN DEFICIENCIES ON PROJECTS                                

Author: Abdulrahim Alhazmi

International Journal of Mechanical and Industrial Technology      

ISSN 2348-7593 (Online)

Vol. 11, Issue 1, April 2023 - September 2023

Page No: 39-47

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Published Date: 28-August-2023

Abstract: Digital technologies have transformed project execution by providing powerful tools for optimizing project completion schedules and reducing the risk of delays. In this paper, we explore the use of digital technologies for optimized project execution. We begin with an introduction to the potential benefits of digital technologies for project execution. We then discuss specific digital technologies that can be used to optimize completion schedules. We present a case study that demonstrates how the digital technologies were used to optimize the completion schedule of a construction project. The case study highlights the benefits of using digital technologies for project execution, including improved collaboration, real-time insights into project performance, and reduced risk of delays. Finally, we conclude with a summary of our findings and recommendations for practitioners and policymakers on how to leverage digital technologies for optimized project execution. Our results show that digital technologies can significantly improve project efficiency and effectiveness, leading to timely project completion and reduced costs.

Keywords: Digitalizing Project Execution, optimizing project, digital technologies, construction project.

Title: Digitalizing Project Execution for Optimized Completion Schedule

Author: Musab A. Alharbi

International Journal of Mechanical and Industrial Technology      

ISSN 2348-7593 (Online)

Vol. 11, Issue 1, April 2023 - September 2023

Page No: 30-38

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Published Date: 23-August-2023

Abstract: This paper provides an in-depth analysis of the challenges and best practices for effective scheduling and activity sequencing within the context of brownfield projects, which are characterized by unique challenges due to their nature of modifying or expanding existing operational facilities. The paper begins with an introduction to brownfield projects, providing briefing of the challenges in managing such projects. It then explores the criticality of project scheduling, which forms the backbone of successful project management, before discussing the crucial role and benefits of optimal activity sequencing throughout the project life cycle. The paper further explores comprehensive set of the best practices and strategies for scheduling and sequencing, including a detailed understanding of the project scope, application of the Critical Path Method (CPM), resource leveling and risk management. The paper also highlights the importance of real-time data incorporation, effective communication, and promoting a culture of continuous learning and improvement. These practices, when combined, can significantly enhance decision-making processes, foster teamwork, and facilitate project success.

A range of tools and techniques were explored that can be instrumental in achieving optimal scheduling and activities sequencing. These include Primavera P6, Work Breakdown Structure (WBS), AI and Machine Learning integration, PERT diagrams, Network Diagrams, and Gantt Charts offering a comparative analysis of their effectiveness. Each tool is discussed in terms of its functionality and applicability to Brownfield projects.

The paper concludes by re-emphasizing the necessity of these best practices and tools for managing Brownfield projects effectively. It asserts that successful project management in such complex environments requires a blend of strategic planning, effective communication, and the right set of tools. The paper serves as a guide for project Management professionals, offering valuable insights and practical solutions for successfully navigating the complexities associated with Brownfield projects.

Keywords: activity sequencing, brownfield projects, project life cycle. Critical Path Method (CPM).

Title: Best Practices for Optimal Scheduling and Activities Sequencing on Brownfield Projects

Author: Ahmed S. Alsaedi

International Journal of Mechanical and Industrial Technology      

ISSN 2348-7593 (Online)

Vol. 11, Issue 1, April 2023 - September 2023

Page No: 23-29

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Published Date: 21-August-2023

Abstract: In this paper, based on Jumarie type of Riemann-Liouville (R-L) fractional calculus and a new multiplication of fractional analytic functions, we obtain a fractional definite integral formula. Moreover, some examples are provided to illustrate the applications of this formula. In fact, our formula is a generalization of traditional calculus formula.

Keywords: Jumarie type of R-L fractional calculus, new multiplication, fractional analytic functions, fractional definite integral formula.

Title: A Fractional Definite Integral Formula and Its Applications

Author: Chii-Huei Yu

International Journal of Mechanical and Industrial Technology      

ISSN 2348-7593 (Online)

Vol. 11, Issue 1, April 2023 - September 2023

Page No: 18-22

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Published Date: 17-July-2023

Abstract: This study examines the retirement/disposal of outdated vehicles with a specific focus on the Pakistani perspective. The study investigates current trends and environmental standards in Pakistan for automobile safety and disposal and identifies the criteria being followed to categorize vehicles as retirement-worthy. The research also discusses the policies in place to control vehicle emissions and the advantages of retiring old vehicles in terms of pollution and economy. Qualitative data was gathered through interviews with 14 individuals from the automobile sector, regulatory authorities, and automobile users. The analysis reveals that there are no government criteria for the disposal of old vehicles in Pakistan and that the decision to dispose of a vehicle is often based on the owner's financial circumstances and availability of new models. The research suggests that early vehicle retirement programs, mandatory testing of vehicle emissions, and fitness inspection centers for all road-going vehicles are necessary to improve the disposal practices. The article recommends that the government launch awareness campaigns to educate the public about the harmful effects of using high-emission vehicles and mandate better-quality fuel to allow for higher emission standards. The import of older cars up to 7-8 years, provided they meet the Euro II standard, should be allowed, and duty-free import of "Kei" cars should be permitted to increase competition in the market and promote vehicle performance improvement.

Keywords: Automobiles Disposal; Battered Vehicles; Vehicle safety and emissions standards; Vehicle Replacement; Obsolete Automobiles; Developing Countries.

Title: Automobiles Disposal: A Case of Pakistan

Author: M. Owais Yunus, Sarah Ahmad

International Journal of Mechanical and Industrial Technology      

ISSN 2348-7593 (Online)

Vol. 11, Issue 1, April 2023 - September 2023

Page No: 7-17

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Published Date: 05-May-2023

Abstract: In this paper, based on Jumarie type of Riemann-Liouville (R-L) fractional derivative and a new multiplication of fractional power series, we use some examples to illustrate how to use fractional power series method to solve fractional differential equations. In fact, our results are generalizations of the results of ordinary differential equations.

Keywords: Jumarie type of R-L fractional derivative, new multiplication, fractional power series, fractional differential equations.

Title: Application of Fractional Power Series Method in Solving Fractional Differential Equations

Author: Chii-Huei Yu

International Journal of Mechanical and Industrial Technology      

ISSN 2348-7593 (Online)

Vol. 11, Issue 1, April 2023 - September 2023

Page No: 1-6

Research Publish Journals

Website: www.researchpublish.com

Published Date: 22-April-2023