Question

Charpy test method as lab report:

1)introduction

2)Equipment/Apparatus

3)Procedures

4)Results

5)Comments

Answer 1

namme & energy required being a me Theory? in an impact dest a specially prepared notched nen is fractured by a single brow from a heavy ergy required being a meas are of resistance to impact. Impad wand is produced by a swinning of an impau weigh & Chamme) from a height. Release of the weight from the height swine the weight through the arc of a clocle, which stake the specimen to fracture of the notch there it is intesting to note thout height through which hamme drops determines the velocity & & mass of a hammel combined determine the can be measured from the scall given. The difference benween potential energies is the protelle energy in test machine this value indicated by the pointed on the scale This energy value called impact toughnes or impact value, which will be measured ive unit orea at the notch. leghe resed ey fnergy eray

specili cation of mic and specimen Detailst & Impact capacity – 300. youle. least count of capacity (dial)s and of capacity (dial) scale = 2.30ule. & weight of striking hammel &18.1 KI & swing diameres of hommes & 16oomm. DU * Angle or hammed before stalking = 160. a & Distance between support = 400mm, of hammel & 5.6misee. & Striking velocity swigh & specimen size - 55 x 10 x 10mm. Arike s samme ad on 94hne & Type of notch ar-notch con or notch. & Angle of notch - uso & Death of noach - 2 mm. PROCEDURE On the stoiking hammel (pend wlum) in sate test position. firmly hold the steel specimen in impact testing machine vice in such a way that the notch. faces s' the hamme & is hold inside & half above the yop susface of the vice 2. Bring the striking homme to its top most stoning, Position unless it is already there, t locre is a real position. 3. Bring indicator of the machine to 200 or follow the Instruction of the operation manuod supplied with the machine

V La Relese the homme, is will fall au 40 graving, & bent the specimen through its momentum, the 1040 energy is nou absorbed by the specimen. Then to continue to swing & H topmost heigh and breaking the specimen, the indicator stops moving while the pendwum on halls al te the indicator at the topmos siud position 5. The specimen & placed on support or anvil so suas the blow of nomme is opposite to the notch. OBSERVATION spolnitial energy Residual energ Absorb energy (€) joule I (En] Joule CE - €23 bacCoye calculation & Modules of rupture = Rupturel etreceive volume of Specimen UOCO Sen94 mm NA Il cross section PRECAUTIOPS2 & The specimen should be prepared ed in propel dimenson * Take reading more a requently. & place the specimen prope Dosision. & make the losses poinne in contact winn fixed pointed outtel getting the pendulun.

RESULTE Impact strengen of given specimen = jouren comments t absorbed of the specimen in impach de vermined * mention transition temp. is determine

Scale Starting position End of swing Hammer Specimen Anvil