tapany udomphol المحاضرات

01 - Introduction To Mechanical Metallurgy | PDF

 · Tapany Udomphol. May-Aug 2007 Objectives This chapter provides a background of continuum description of stress and strain and extends it to the defect mechanisms of flow and fracture of metals. Elastic and plastic behaviours of metals are highlighted and factors influencing failure in metals are finally addressed. Suranaree University of Technology


06 - Weld Ability and Defects in Weldments | PDF

 · Weldability and defects in. weldments Subjects of Interest • Reviews of weld design and weldability • Residual stresses and weld distortion • Weld metal inhomogeneities • micro/macro segregations • Banding • Inclusion • Gas porosity • Weld cracking • Solidification cracking • Liquation cracking • Hydrogen cracking. Suranaree University of Technology …


12_Fatigue of metals_

Tapany Udomphol May-Aug 2007 Objectives • This chapter provides fundamental aspects of fatigue in metals and the significance of fatigue failure. • Different approaches for the assessment of fatigue properties, i.e., fatigue S-N curve and fatigue crack growth ...



Chemical Reactions and Metal Flow in Welding | PDF - Scribd

 · Tapany Udomphol. Sep-Dec 2007 Objectives. This chapter provides information on chemical reactions occurring during welding. This is for example the reactions between the weld and gases (oxygen, nitrogen and hydrogen) and slag which significantly affect microstructure of the weld, and hence the properties of the weld.


04_Extrusion_

Tapany Udomphol Jan-Mar 2007 Objective • This chapter aims to provide useful information on different extrusions processes, which can be mainly divided into direct and indirect extrusion …


Lecture 5 - Dislocation theory - sygdoms

 · Tapany Udomphol. Suranaree University of Technology May-Aug 2007 Dislocations in BCC cubic lattice •Slip occurs in the BCC lattice on {110}, {112}, {123} planes in the <111> direction and a Burgers vector b =(a o/2)[111]. Cottrell has suggested a dislocation reaction which appears to cause


موقع دروس الإمارات | رسالتنا نشر العلم الصحيح ...

تهدف إلى نشر العلم الصحيح من خلال الإعلان عن الدروس والمحاضرات التي يلقيها فضيلة المشايخ الثقات، كما توفر الخدمة البث المباشر للدروس والمحاضرات رسالتنا: نشر العلم الصحيح. قيمنا: الوسطية والاعتدال


Chapter 7 - Machining of metals - pgsite

 · Tapany Udomphol. Suranaree University of Technology Jan-Mar 2007 However, in practice, the shear plane angle φφφφis varied depending on the nature of each material (composition & heat treatment) to be machined. Based on the upper bound model of the shear zone, a criterion



Forging Calculations - [PDF Document]

 · Tapany Udomphol. Suranaree University of Technology Jan-Mar 2007. Summary. Mainly hot forging Blacksmith, now using water power, steam, electricity, hydraulic machines. Heavy forging - Hydraulic press = slow, high force squeeze. - Pieces up to 200 tonnes with forces up to 25,000 tonnes.


04_Extrusion_

Tapany Udomphol Jan-Mar 2007 Objective • This chapter aims to provide useful information on different extrusions processes, which can be mainly divided into direct and indirect extrusion processes. This also includes basic background on hydrostatic extrusion ...


03 Elements of The Theory of Plasticity | PDF - Scribd

 · Tapany Udomphol. May-Aug 2007 Objective This chapter provides a basic theory of plasticity for the understanding of the flow curve. Differences between the true stress true strain curve and the engineering stress engineering strain curves will be highlighted. Finally the understanding of the yielding criteria for ductile materials will be made.


00_Introduction to mechaical metallurgy course_

Tapany Udomphol May-Aug 2007 Objectives • Interaction of stress and strain on materials in elastic and plastic manners will be understood. • Deformation behaviour of metals due to dislocation interaction as well as strengthening mechanisms of metals will be ...


08 Tension Test | PDF | Deformation (Engineering) | Yield

 · Tapany Udomphol. May-Aug 2007. fExample: In the tension test of a metal fracture occurs at maximum load. The conditions at fracture were: Af = 100 mm2 and Lf = 60 mm. The initial values were: Ao = 150 mm2 and Lo = 40 mm. Determine the true strain to fracture using changes in both length and area.



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 · Tapany Udomphol Transformation hardening weldingTransformation hardening carbonsteels carbonsteels Low carbon steels (upto 0.15%C) mildsteels (0.15 0.30%)Medium …


Chapter 2 Forging - pgsite

 · Tapany Udomphol. Typical values of velocity for different forging equipment Forging machine Velocity range, ms-1 Gravity drop hammer 3.6-4.8 Power drop hammer 3.0-9.0 HERF machine 6.0-24.0 Mechanical press 0.06-1.5 Hydraulic press 0.06-0.30 Suranaree University of Technology Jan-Mar 2007


Chapter 4 - Extrusion

Tapany Udomphol. Suranaree University of Technology Jan-Mar 2007 1) Flat-faced dies 2) Dies with conical entrance angle Die entrance αααα αααα ...


Chapter 5 - Drawing of rod-wire and tubes - pgsite

 · Tapany Udomphol. Suranaree University of Technology Jan-Mar 2007 Objectives •This chapter provides fundamental background on processes of drawing of rods, wires and tubes. •Mathematical approaches for the calculation of drawing load will be introduced.


06 Strengthening Mechanisms | PDF | Dislocation - Scribd

 · Suranaree University of Technology Tapany Udomphol May-Aug 2007 Properties affecting strengthening mechanisms by particles Coherency strain Modulus effect • Misfit between particles and matrix • Modulus difference between the produces strain field improving matrix and the particles produces strength.


Chapter 6 - Sheet-metal forming

 · Tapany Udomphol. Suranaree University of Technology Jan-Mar 2007 Objectives •Methods of sheet metal processes such as stretching, shearing, blanking, bending, deep drawing, redrawing are introduced. •Variables in sheet forming process will be discussed together


tapany udomphol المحاضرات

 · tapany udomphol lectures. Tapany Udomphol Suranaree University of Technology May-Aug 2007 Density of metals Density of metals Metal Density (g.cm-3) Iron 7.87 Steel 7.80 …


Lecture 2 aluminium and aluminium alloy -

 · Annealedhigh-purity aluminium has very low yield strength (7-11 MPa), solidsolution hardening. mosteffective strengthener weightbasis due itshigh solubility. Note: Zinc has high …


tapany udomphol المحاضرات

Tapany Udomphol Suranaree University of Technology May-Aug 2007 Lead Lead - Physical properties and application Pb Lead CCP 207.2 Crystal structure Cubic closed packed Atomic …


(PDF) Subjects of interest | Meher Puneeth - Academia.edu

Suranaree University of Technology Tapany Udomphol Jan-Mar 2007 f Fundamental concept of metal rolling 1) The arc of contact between the rolls and the Assumptions metal is a part of a circle. 2) The coefficient of friction, µ, is constant in theory, but in reality µ …


Fundamental concept of metal rolling

 · Suranaree University of Technology Tapany Udomphol Jan-Mar 2007. Suranaree University of Technology Jan-Mar 2007 •The distribution of roll pressure along the arc of contact shows that the pressure rises to a maximum at the neutral point and then falls off.


Wire Drawing | PDF | Heat Treating | Pipe (Fluid …

 · Suranaree University of Technology Tapany Udomphol Jan-Mar 2007 Draw head Rod drawing Metal • Rods which can not be coiled, are stock produced on drawbenches. Rod is swaged Machine capacity : Insert though the die • 1 MN drawbench • 30 m of runout Clamped to the jaws of the drawhead • 150-1500 mm.s-1 draw speed


Chemical reactions and -

 · Tapany Udomphol Oxygen Suranaree University TechnologySep-Dec 2007 air, excess oxygen oxyfuelwelding, shieldinggas, fromslag- metal arc reaction. oxygen can oxidize …



Chapter 8 Advanced metal forming processes - pgsite

 · Tapany Udomphol. Suranaree University of Technology Jan-Mar 2007 Hot IsostaticPressing (HIP) • Components are loaded into furnace, which is placed into pressure vessel. • Temperature and pressure are raise simultaneously and held. • Cooling is carried out as the gas is released (clean


05 - Phase Transformation in Welding PDF | PDF - Scribd

 · Suranaree University of Technology Tapany Udomphol Sep-Dec 2007 Overageing in aged hardenable Al welds (2xxx, 6xxx) Precipitate hardening effect which has been achieved in aluminium alloy base metal might be suppressed after welding due to the coarsening of the precipitate phase from fine (high strength/hardness) to coarse (Over-ageing : non ...


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