Yusuf Furkan Yapan

• PhD Student
• Research Assistant at Yıldız Technical University

Recently, increasing pressure on industries to innovate and adopt sustainable techniques has sparked investigations into machining strategies that have minimal carbon emissions, minimal energy consumption by machine tools, and low machining costs. The primary aim of this paper is to identify the machining conditions that can fulfill the criteria of...

This study aims to investigate the effects of Minimum Quantity Lubrication (MQL) independent pulse parameters, which are the intervals between two pulses (1, 2, and 3 seconds) and the duration of the lubricant application (1, 2, and 3 seconds), in the turning of AISI 1040 steel. MQL pulse parameters supplying the best lubrication in terms of cuttin...

Ti–6Al–4V alloy's machining poses considerable challenges owing to its low thermal conductivity, high strength, and interaction with cutting tools, leading to issues related to machining performance and surface quality. To address these challenges, in the presented study, the minimum quantity lubrication method using the hBN/MWCNT hybrid nanofluid...

Sanctions aimed at reducing carbon emissions promote the adoption of sustainable materials, such as carbon fiber-reinforced polyetheretherketone (CF/PEEK) thermoplastic composites, in the aerospace sector due to their distinctive characteristics. The application of the secondary machining used in the production of functional components from CF/PEEK...

This paper presents an investigation into the machinability of hot work tool steel AISI H11 (DIN 1.2343). Experiments were conducted under different environments: dry cutting, minimum quantity lubrication (MQL) using vegetable oil, and two MQL configurations with nanofluids (NF-MQL), one containing hexagonal boron nitride (hBN) and the other contai...

Ti-6Al-4V alloy, widely utilized in aerospace, medical industries, and specialized applications, boasts exceptional properties. However, its limited formability poses challenges in manufacturing processes. The pulsating loading method emerges as a promising solution to enhance formability in such materials. This study delves into the impact of stre...

Nowadays, various problems, such as high thermal expansion coefficient and built-up edge, occur in the aluminum (Al) alloys machining. Considering the widespread use of aluminum alloys due to their advantages such as low density and corrosion resistance, the need for sustainability and efficiency in the Al alloys machining increases. In the present...

Aluminum 6082 alloys are commonly utilized in significant industries because of their unique characteristics. However, they exhibit poor machinability as a result of their high ductility, high thermal expansion coefficient, and tendency to built-up edge formation. Considering the alloy's widespread usage, the difficulty of machining it raises susta...

This chapter offers an insightful examination of the advancements in machining aerospace materials, focusing on ultrasonic vibration-assisted (UVA) machining and minimum quantity lubrication (MQL) techniques. It begins with an introduction to the unique challenges associated with machining these advanced materials and how UVA machining and MQL have...

This study aims to investigate the impact of parameters associated with minimum quantity lubrication (MQL) in CNC turning of DIN 1.2738 plastic mold steel. The independent parameters considered include flow rate (Fr\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy}...

There has not been any damage prediction using Johnson-Cook’s (JC) hardening and damage model in the hydraulic bulging (HB) and hydroforming (HF), which are the advanced manufacturing processes, of the Ti-6Al-4V (Ti64) alloy. In the presented study, the damage behavior of the Ti64 alloy sheet in the HB and HF processes was investigated both experim...

Al6061-T651 alloy is widely used in the aerospace industry due to its superior properties and is a very difficult-to-cut material with high quality because of tool wear and thermal softening. This situation causes low surface quality, high cutting force, and limited tool life, as well as an increase in total consumed energy, total carbon dioxide em...

Ti-6Al-4V alloy sheet is an engineering material that is widely used due to its superior properties such as high strength-to-density ratio besides high temperature and corrosion resistance. However, its low formability at room temperature limits its wider applications. In this study, a cylindrical cup was hydroformed using a female die to examine h...

The present work aims to decide on machining parameters and enhance machinability of the biomedical Ti6Al7Nb alloy using nanofluid MQL with nanoparticles of graphene (NMQL) and ultrasonic vibration assisted (UVA) machining methods were applied both separately and in a hybrid manner. Consequently, for the chosen cutting parameters, when compared to...

The main aim of this study was to evaluate the ease of machining unreinforced polypropylene (PP), focusing on surface quality ( Ra ), cutting temperature ( T ), and specific cutting energy ( Ecs ) during turning. We conducted experimental tests using both dry machining and minimum quantity lubrication (MQL) conditions. We analyzed key factors such...

This paper evaluates the energy criteria for machinability during CNC turning of unreinforced polypropylene. The aspects considered are tangential force (FZ ), cutting power (Pc ), material removal rate (MRR ), cutting energy (Ec ), and specific cutting energy (Ecs ). More specifically, the study examines the effect of turning with minimum quantity...

Over the years, the use of traditional metalworking fluids has negatively impacted worker health and the environment. Therefore, minimum quantity lubricant (MQL) has successfully proven to be effective in overcoming this problem. In addition, nanofluid-assisted MQL (NF-MQL) is one of the suggested techniques to further improve MQL performance, espe...

Polypropylene (PP) material and its composites are preferred for many applications due to their advanced properties. Although PP material products are produced in a near-net shape, milling, which is a secondary machining process, is required to obtain dimensional tolerances, appropriate geometric shapes, and quality surfaces. For this reason, the c...

This study aims to increase the limited formability of the Ti-6Al-4V sheet at room temperature using the pulsating hydraulic bulging and to investigate the microstructural reasons for the increased formability. Accordingly, monotonic and pulsating hydraulic bulge tests (HBTs) were applied to Ti-6Al-4V sheets with 0.55 mm thickness at room temperatu...

Bu çalışmada, dövme yöntemiyle üretilmesi problemli olan otomobil salıncak bağlantı parçasının Tüp Hidroşekillendirme (THŞ) prosesiyle üretilmesi için gerekli basınç ve eksenel besleme yükleme profilleri, sonlu elemanlar analiziyle birlikte Bulanık Mantık Kontrol Algoritması (BMKA) ile elde edilmiştir. 3 mm kalınlıklı St 37 malzeme borudan salıncak...

In this study, it is aimed to determine the suitable quasi-static material model for Ti-6Al-4V alloy. In this context, the experimental flow curve was determined by performing three repetitive tensile tests at a strain rate of 3.333x10-4 s-1. Then, the parameters of Hollomon, Ludwik, Swift, Voce, and Gosh quasi-static material models were determine...

In this study, geometric parameters affecting the design of thick-walled cylinders operating under ultra-high pressure were investigated. In this context, the effects of design parameters on the maximum stresses occurring on the inner surface of the cylinder and the maximum interface pressure between the layers under 350 MPa pressure were determine...

In this study, the fatigue life of a shrink-fitted two-layer cylinder operating under high pressure is estimated by using Finite Element Method (FEM).