Overview of Five Different Microstructures in Welded Steel

Satisfactory Essays
ME2151-2 – Metallography (C8)
Formal Report

Objectives * To obtain experience in the metallographic preparation of metallic specimens. * To observe the various microstructures in a welded mild steel joint.

Results

Overview of 5 different microstructures in welded steel

Detail microstructures of 5 different zones

Discussion and analysis of results * The heat affected zone is a composition of parent metal which was heated to a high enough temperature for a sufficient period but doesn’t melt so that grain growth occurred. The heat affected zone is also the region whose mechanical properties and microstructure have been altered due to the heat of welding. The heat affected zone undergoes sudden heating followed by rapid cooling, thereby containing a series of microstructures. These microstructures within the heat affected zone are basically categorized into three different zones, namely the grain growth zone, grain refinement zone and transition zone. * * The fusion zone exists between the grain growth zones. The parent metal in this zone was heated to the melting point followed by cooling process. * The grain growth zone is right adjacent to the fusion zone. The parent metal has been heated to a temperature well above the upper critical temperature in this zone. Subsequently, this results in the grain growth or coarsening of the structure. Coarse ferrite grains, Widmanstatten ferrite and pearlite are found in this region. * The grain refinement zone is next to the grain growth zone. The parent metal has been heated to a temperature which is just above the upper critical temperature in this zone, where grain refinement is finished, resulting in the existence of the finest grain structure. Owing to the relatively lower temperature, the ferrite and pearlite, which are represented by the white and dark areas respectively are both much finer. This shows complete recrystallization. * the transition zone is the region where

You May Also Find These Documents Helpful

  • Powerful Essays

    to examine the influence of welding speed and power on weld bead geometry and performance parameters such as duty cycle, pulse overlap, energy density and bead diameter. In this contest, first experiment is conducted on austenitic 304L stainless steel sheet by varying the welding speed from 2 mm/s to10 mm/s and second experiment is conducted varying laser power from 300 W to 3500 W. It was found from the experimental and analytical approach welding speed and laser power significantly affects on…

    • 3474 Words
    • 14 Pages
    Powerful Essays
  • Powerful Essays

    Microstructure of Materials

    • 4417 Words
    • 18 Pages

    This report presents a study on the microstructure of 8 material samples using the proper optical microscopy techniques. Emphasis is given in sample preparation, the right use of transmitting and reflecting optical microscopy methods, and a detailed analysis of the distinct microstructure of metal, ceramic, and polymer materials. For metals and ceramics, preparation procedures include grinding, polishing, and surface treatment (etching) which may vary in different samples. Generally, for opaque materials…

    • 4417 Words
    • 18 Pages
    Powerful Essays
  • Better Essays

    market microstructure

    • 2473 Words
    • 10 Pages

    Discuss the influence that high frequency trading algorithms have had on asset markets. The objective of this study is to understand the rapid changes in the asset market as a result of High Frequency Trading. HFT influences various factors such as price, liquidity, welfare etc. To begin with the basic concept, an asset market is where an individual attains contractual right to a wealth that is either bought or sold. Common examples of assets are stocks, bonds, mortgages etc. The latest technological…

    • 2473 Words
    • 10 Pages
    Better Essays
  • Powerful Essays

    IRON AND STEEL INDUSTRY Submitted by Vivek Agarwal Roll No-68 | | TABLE OF CONTENTS 1. ACKNOWLEDGEMENT 3 2. ABSTRACT 7 3. INTRODUCTION…

    • 7130 Words
    • 29 Pages
    Powerful Essays
  • Satisfactory Essays

    The five different approaches to motivation The first being instincts which are the patterns of behavior that are biologically determined rather than learned. Fact: people and animals are born preprogrammed with sets of behavior's essential to survive. The second being the drive-reduction approach. It suggests that a lack of some basic biological requirement such as water produces the drive to obtain the water. The third being the arousal approach in which each person tries to maintain a…

    • 261 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    Unit 13, task 1. P1 – Describe the microstructure of a typical animal cell and the functions of the main cell components. A typical animal cell is seen as a tiny, three dimensional sac which is in fact made up of many components, each as important as the other. The microstructure of an animal cell was in fact uncovered mainly through the use of both cell fractionation and electron microscopy. Each main component has its own, individual function which helps a cell to function and maintains the…

    • 1816 Words
    • 52 Pages
    Powerful Essays
  • Satisfactory Essays

    To sum up, Kurt Vonnegut uses Billy Pilgrim to represent soldiers in wars to deliver Slaughterhouse Five as an anti-war book. Since this is an anti-war novel, the author does the opposite what a war novel does, he creates an anti-hero, Billy, who lacks the ideal characteristics of a hero. The novel portrays the unattractiveness of male physiques under stress through emphasizing Billy's unkempt body throughout the book. Opposite to Billy's terrible figure, the soldiers with huge muscles are the Englishmen…

    • 150 Words
    • 1 Page
    Satisfactory Essays
  • Better Essays

    especially for welding of stainless steels, aluminum and magnesium. In stainless steel industry, TIG welding has an important role on joining thin sheets, tubes and pipes. Depending on this important role, the mechanical behaviours of TIG welded joints and criteria affecting these behaviours are the main cared subjects in industry to obtain products with less failure and use them for longer service times. Mechanical behaviours of TIG welded joints in stainless steels are also the main subject of the…

    • 1548 Words
    • 7 Pages
    Better Essays
  • Satisfactory Essays

    Steel and Rev

    • 750 Words
    • 3 Pages

    BIS CODE : INDIAN STANDARD for Structural Engineering IS: 800-1984 Code for practice for general construction in steel. SP6 (1) Handbook for structural steel sections. SP:6(5)-1980 Hand book for Cold formed, Light Gauge steel structures. SP:6(6)-1972 Handbook for application of plastic theory in design of steel structures. SP:6(4)-1969 Project & Construction Management for Large Industrial Projects. IS: 206 -1992 (4th Rev) Tee & strap hinges - Specification. IS: 459 -1992…

    • 750 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    Reinforcing Steel

    • 1165 Words
    • 5 Pages

    REINFORCING STEEL: Reinforced concrete was designed on the principle that steel and concrete act together in resisting force. Concrete is strong in compression but weak in tension. The tensile strength is generally rated about 10 percent of the compression strength. Steel is the best material for reinforcing concrete because the properties of expansion for both steel and concrete are considered to be approximately the same; that is, under normal conditions, they will expand and contract at an almost…

    • 1165 Words
    • 5 Pages
    Good Essays