HOT CRACKS & COLD CRACKS

A line on the surface of METAL or WELDED REGION along which it has split without breaking into separate parts. Crack is consider as most severe defect among  WELD DEFECTS. This presentation is define and explain  the types of cracks, crack promoting factors .

FRACTURE TOUGHNESS TESTING

                                                    FRACTURE TOUGHNESS TESTING

 Fracture toughness is a quantitative way of expressing a material's resistance to brittle fracture when a crack is present. This presentation gives the detail about how to calculate the fracture toughness.

CREEP

                                                              CREEP
   Creep is the tendency of a solid material to move slowly or deform permanently under the influence of mechanical stresses.Creep is more severe in materials that are subjected to heat for long periods, and generally increases as they near their melting point.

NITRIDING

NITRIDING

             Nitriding is one of the heat treatment method. The main objective of this method is case hardening of the steels. Below presentation is explain the nitriding process and types of layer presented in case harded metal surface.

DUPLEX STAINLESS STEEL

CORROSION AND IT'S TYPES

WELDING - DEFINITION & TYPES

WELDING

DEFINITION

         Welding is the process of joining two similar (or) dissimilar materials by the application of heat and with (or) without application of pressure and with (or) without the use of filler materials.

WELDING TYPES

Welding process types based on heat generation :

        Welding process are classified based on the method of heat generation and welding process are grouped in to six main groups. they are showed in the below diagram

welding process types based on filler material used: