Ders Bilgileri

#### Ders Tanımı

Ders Kodu Yarıyıl T+U Saat Kredi AKTS
DESIGN AND METALLURGY OF WELDED JOINTS CMM 518 0 3 + 0 3 6
Ön Koşul Dersleri None None
 Dersin Dili Türkçe Dersin Seviyesi Yüksek Lisans Dersin Türü SECMELI Dersin Koordinatörü Prof.Dr. HÜSEYİN UZUN Dersi Verenler Dersin Yardımcıları None Dersin Kategorisi Alanına Uygun Öğretim Dersin Amacı This course provides to understand the weldability of metals which is considered in term of the various process variables of fusion welding and the weld thermal cycle at the level of M.Sc. and Ph.D. It also provides to evaluate the type of cracking problems in term of alloy Dersin İçeriği Weld defects. Cost analysis of welded joints. Prediction and control of distortion. Residual stresses: Destructive and non destructive testing of welds. Weldability tests. Weldability of metals. Welding metallurgy. Automation in welding. The absorption of nitrogen and hydrogen gases in the weld metal. The chemical composition of weld. The weld thermal cycle, heat flow equations. The thermal cycle of the base metal and weld metal. Weld simulation. Residual stresses in welds. Numerical methods of estimating residual stresses in welds. Characteristics weld solidification. Geometry of weld melt. Crystal growth and segregation during the welding. Phase transformation during cooling of the weld metal. Predicting the microstructure and properties of weld metals. The microstructure and properties of heat affected zone (HAZ).
 Dersin Öğrenme Çıktıları Öğretim Yöntemleri Ölçme Yöntemleri 1 - To be able to distinguish the different regions of a fusion weld in common engineering alloys 1 - 5 - A - B - C - 2 - To be able to distinguish the fundamental concepts of solidification under equilibrium and non equilibrium conditions and the characteristics of weld solidification and define the geometry of weld melt 1 - 5 - A - B - C - 3 - To be able to evaluate the absorption of nitrogen and hydrogen gases in the weld metal 1 - 5 - A - B - C - 4 - To be able to evaluate the various mechanisms by which a partially melted zone forms in fusion welds 1 - 5 - A - B - C - 5 - To be able to compose the grain growth mechanism in weld region and which factors can be affected the grain growth in common engineering alloys 1 - 5 - A - B - C - 6 - To be able to estimate the various metallurgical reactions that give rise to a heat-affected zone in common engineering alloys 1 - 5 - A - B - C - 7 - To be able to calculate the weld cooling time 1 - 5 - A - B - C - 8 - To be able to evaluate how to use continuous cooling time (CCT) and time temperature transformation (TTT) diagrams for the welding of steels 1 - 5 - A - B - C - 9 - To be able to evaluate the micro hardness distributions of weld regions 1 - 5 - A - B - C - 10 - To be able to estimate the various types of cracking associated with fusion welds, the basic principles of weld solidification cracking and the mechanisms proposed to explain this form of cracking 1 - 5 - A - B - C - 11 - To be able to judge how weldability tests can be used to quantify cracking susceptibility 1 - 5 - A - B - C -
 Öğretim Yöntemleri: 1:Lecture 5:Demonstration Ölçme Yöntemleri: A:Testing B:Oral Exam C:Homework

#### Ders Akışı

Hafta Konular ÖnHazırlık
1 Common weld defects like weld cracks, LOP, LOF, porosity, blow holes etc., remedies and control,
2 Welding design and welding symbols.
3 Costing factors of welding jobs- fabrication cost, material cost, preparation cost, finishing cost, overhead cost etc., economy in preparation and welding a job, labour accomplishment factor, cost calculation of welded jobs.
4 Calculation of longitudinal contraction, transverse contraction, angular contraction due to single weld pass, control of welded distortion, and calculation of shrinkage.
5 Introduction, types, effect of thermal stresses, control of residual welding stresses.
6 Destructive tests, equipment required and test piece geometry for tensile test, bend test, impact test, hardness test, brittle and fatigue failure tests,
7 Non destructive tests for welds:-dye penetrate inspection, magnetic particle inspection etc.
8 Welding techniques, preparation of joints and electrode types for gray cast iron welding,
9 To be able to evaluate how to use continuous cooling time (CCT) and time temperature transformation (TTT) diagrams for the welding of steels
10 To be able to estimate the various types of cracking associated with fusion welds, the basic principles of weld solidification cracking and the mechanisms proposed to explain this form of cracking
11 Titanium and its alloys. Aluminium and its alloys welding Welding of Stainless steels
12 Thermal effect of welding on parent metal, structure of fusion welds, effect of cooling rate,
13 Weld metal solidification and heat affected zone.
14 Introduction and concept, classification of welding automation, economics of welding automation.

#### Kaynaklar

Ders Notu

Modern welding technology:- Carry H. B. (PH).

Ders Kaynakları

2.Welding technology: - A. C. Devis
3. Welding and welding Technology: - Little (TMH)
4. Welding technology: - R. S. Parmar
5. AWS- welding handbook (IV ? VI) Edition
6. Elements of machine design: - Pandya and Shah

#### Dersin Program Çıktılarına Katkısı

No Program Öğrenme Çıktıları KatkıDüzeyi
1 2 3 4 5

#### Değerlendirme Sistemi

YARIYIL İÇİ ÇALIŞMALARI SIRA KATKI YÜZDESİ
AraSinav 1 50
Odev 1 30
PerformansGoreviSeminer 1 20
Toplam 100
Yıliçinin Başarıya Oranı 60
Finalin Başarıya Oranı 40
Toplam 100

#### AKTS - İş Yükü

Etkinlik Sayısı Süresi(Saat) Toplam İş yükü(Saat)
Course Duration (Including the exam week: 16x Total course hours) 16 3 48
Hours for off-the-classroom study (Pre-study, practice) 16 3 48
Mid-terms 1 1 1
Assignment 2 15 30
Performance Task (Seminar) 1 10 10
Final examination 1 15 15
Toplam İş Yükü 152
Toplam İş Yükü /25(s) 6.08
Dersin AKTS Kredisi 6.08
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