Effect of Particle Size and Shape Distribution on Flowability of Metal Powders To Be Processed on Selective Laser Melting Machine And Importance of MetalPowder Selection
Başlık çevirisi mevcut değil.
- Tez No: 714567
- Danışmanlar: PROF. QUİRİCO SEMERARO, DR. STEFANİA CACACE
- Tez Türü: Yüksek Lisans
- Konular: Makine Mühendisliği, Mechanical Engineering
- Anahtar Kelimeler: Selective Laser Melting, Gas Atomized Metal Powders, Water Atomized Metal Powders, Plasma Atomized Metal Powders, Flowability, Particle Size and Shape Distribution, Regression, FT4 and Morphologi 4
- Yıl: 2022
- Dil: İngilizce
- Üniversite: Politecnico di Milano
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 111
Özet
Özet yok.
Özet (Çeviri)
Nowadays, Additive Manufacturing is rapidly becoming a necessary technology and needs to be developed in order to perform efficient and reliable production of the metallic parts with extremely complex shape. There are some various examples in the industry that can be listed as Selective Laser Sintering, Laser Beam Welding and Selective Laser Melting. On the other hand, the primary goal of this work is to make a research about the working principle and importance of the Selective Laser Melting in the industry. Furthermore, the most suitable metallic powder types are investigated. Intrinsically, each metallic powder has different particles in terms of their size and shape and that fact means that particle size and shape distribution of each powders are different. Metallic powders can also be divided into three such as gas atomized powders, plasma atomized powders and water atomized powders in terms of the way that they are produced. According to nature of these powder types, they have different morphology and they have different effects on the quality of the final part. In order to measure the particle size and shape distribution, some alternative methods are exploited such as Scanning Electron Microscope, Transmission Electron Microscope and Morphologi 4 machine. Moreover, in this research Mophologi 4 which is an innovative device is utilized for characterizing particle shape and size distribution. Another important parameter that affects quality of the manufactured part on the SLM (Selective Laser Melting) machine is the powder's tendency to flow (flowability). FT4 Rheology machine is also chosen to assign the flowability values of the different type of metallic powders in terms of different methodologies such as Cubic Bulk Density and Basic Flowability Energy among all techniques for the flowability determination of the powders such as Carney Funnel, Hall Flowmeter, Angle of Repose etc. It must also be noted that there is a great relationship between particle morphology (particle size and shape distribution) and flowability and that fact must be proved in this research. Previous researches show that powders having particles with greater size and more spherical (regular) shape have higher flowability values and in this case higher powder bed density is obtained and higher strength values are reached for a given volume. In order words, the quality of the produced part becomes higher. Moreover, the most suitable powder types are chosen in terms of considering minimum required quality of the product and the economic issues of the process. That fact also expresses the importance of the selection of the convenient powder type for SLM machining. Therefore, some cost related analysis should also be carried out during the powder selection stage before production of the parts.
Benzer Tezler
- Püskürtmeli kurutucu tekniği ile farklı taşıyıcılar kullanılarak sentezlenmiş montelukast etkeni içeren kuru toz inhalasyon ürünlerinin karakterizasyonu
Characterization of dry powder inhalation products containing montelukast synthetized using different carriers by spray dryer technique
ELİF ŞAHİN
Yüksek Lisans
Türkçe
2023
Kimya Mühendisliğiİstanbul Teknik ÜniversitesiKimya Mühendisliği Ana Bilim Dalı
PROF. DR. GÜLHAYAT SAYGILI
DOÇ. DR. PELİN BARAN
- Püskürtmeli kurutma yöntemi ile PVA katkılı TiO2 tozlarının granülasyonu ve sinterlenmiş numunelerin karakterizasyonu
Optimization of processing parameters of TiO2 based ceramics by sprey drying
CELAL AVCIOĞLU
Yüksek Lisans
Türkçe
2014
Seramik Mühendisliğiİstanbul Teknik ÜniversitesiMalzeme Bilimi ve Mühendisliği Ana Bilim Dalı
DOÇ. DR. BURAK ÖZKAL
- Parçacıkların yaş granülasyonu
Wet granulation of powders
İLKAY TALU
Doktora
Türkçe
2000
Kimya MühendisliğiAnkara ÜniversitesiKimya Mühendisliği Ana Bilim Dalı
DOÇ. DR. ZEKİ AKTAŞ
PROF. DR. GABRİEL TARDOS
- Görüntü analizi yöntemi ile ufalanmış minerallerin tane şekil karakterizasyonu
Particle shape characterization of comminuted minerals by image analysis method
ADEM TAŞDEMİR
Doktora
Türkçe
2005
Maden Mühendisliği ve MadencilikEskişehir Osmangazi ÜniversitesiMaden Mühendisliği Ana Bilim Dalı
PROF.DR. BAHRİ ÖTEYAKA
- Investigation of the effect of cylpebs grinding media on ball mill dry grinding performance of a chromite ore
Silpeps öğütücü ortamı boyunun bir krom cevherinin bilyalı değirmende kuru öğütülme performansı üzerine etkisinin incelenmesi
MEHMET ORUÇ
Yüksek Lisans
İngilizce
2022
Maden Mühendisliği ve MadencilikMuğla Sıtkı Koçman ÜniversitesiMaden Mühendisliği Ana Bilim Dalı
DOÇ. DR. ÖMÜRDEN GENÇ