8/13/2019 5-Charpy Impact Test

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EXPERIMENT NO:5

AIM:

To determine toughness of given Specimen using Charpy Impacttest.

APPARATUS:

Charpy Impact Machine, specimen.

THEORY : The Vickers Hardness Test was deve oped in !ng and in"#$% &y Smith ' Sand and at Vickers (td. The Vickers Test two distinctforce range, micro )"*g to "***g+ and macro )" g to "$* g+, to covera testing re-uirement. The indenter is same for &oth ranges.

PROCEDURE:

". i/ up the Charpy test & ock on Charpy shrinkage p ace thespecimen on the support.

$. 0 ign centre of specimen notch with centre of specimen &y meansof Charpy setting gauge.

1. Touch striker to test specimen notch and ad2ust indicating pointeron 1**3

4. (ift the pendu um at "$* from specimen &y hand p ace there withock.

%. 5e ease pendu um from that position to hit the specimen ' a owever to swing free y.

6. 0fter swing, stop pendu um &y &rake.

SAFETY PRECAUTION:

". Machine shou d &e insta ed in such a way that swinging rangeshou d not pro2ect in space su&2ected to traffic.

$. 7orking p ace is to &e safe against hitting &y soup of &rokene ements.

1. Correct striker and strikes support shou d &e used.4. Confirm tightness of ifting screw support striker.%. 8o not operate machine if re ease m9c is fau ty.

1MSS/SEMS/META LAB/EXPT NO-5

8/13/2019 5-Charpy Impact Test

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OBSERVATION TABLE:

Formulae:

otch impart testing strength is;I