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https://opportunitytowin.blogspot.in/ is an online platform founded on 6 Dec. 2016 for Digital Resource about all about mechanical knowledge. We also review latest technologies and detailed study about mechanical topics . Basically we provide all data to fulfill curiosity of our readres. We want to make this platform into “One Stop Place For all Mechanical FAQs”.


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    Popular posts from this blog

    MACRO SECTION

    MACRO SECTION Object: To examine a cross section of a weld for internal defects and soundness. Method:  A transverse section of the weld is cut out. The cross section is then visually inspected. The section is filed down from rough to smooth, then emery or wet/dry papered down to a surface finish of 600 grit. The surface is then etched in NITAL (5% - 10% nitric acid in alcohol), washed off, rinsed and dried. (Possibly a final clean with acetone and mount in Bakelite) The specimen is then inspected at up to 10-x magnification. Reporting Results: Material. Welding process. Specimen identification. Sentencing standard. Thickness. Geometric flaws - type, size and location. Internal flaws - type, size and location. Parent metal flaws - type, size and location. Accept or reject, to standard, for each flaw.    Comparison of macro section and micro section:                             ...
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    CHARPY V NOTCH IMPACT TEST

    CHARPY V NOTCH IMPACT TEST Object : To determine the amount of energy absorbed in fracturing a standardized test piece at a specified temperature. Method : A machined, notched specimen is broken by one blow from a pendulum. Because scatter occurs in the results, at least three specimens are used to assess the joint represented. Testing is carried out at a temperature specified in the appropriate application standard. Reporting Results: Location and orientation of the notch.  Testing temperature. Energy absorbed in joules.  Description of fracture appearance. Location of any defects. The Charpy impact test, measured in joules, is an assessment of TOUGHNESS. Transition temperature (curve) in steel.
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    TRANSVERSE TENSILE TEST

    TRANSVERSE TENSILE TEST Object:   Used to measure the transverse tensile strength under static loading of a butt joint employing butt welds. The reduced section tensile test normally fails in the parent metal and so it is not designed to give the tensile strength of the weld. The radius reduced tensile test is a test of the as deposited diluted weld metal. The all weld tensile test, using a longitudinal section from the weld only, is used to check the as deposited undiluted weld metal. (Usually used by consumable manufacturers.) Method: The test piece is clamped at each end and a load is applied by an hydraulic or screw mechanism. The load is increased until fracture occurs. Reporting Results: Type of specimen (e.g. reduced section).  Whether excess eld metal is removed or not. Tensile strength, in Newtons per mm squared, is calculated from maximum load and original cross sectional area. When excess weld metal is not removed, the cross sectional area shall ...
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