1 / 8

IMPACT TEST

IMPACT TEST. EXPERIMENT # 7 Instructor: M.Yaqub. IMPACT LOAD. Shock load or sudden load is referred as impact load. In order to select a material to withstand sudden intense below, we must measure a material’s resistance to failure in an impact test.

kiley
Télécharger la présentation

IMPACT TEST

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. IMPACT TEST EXPERIMENT # 7 Instructor: M.Yaqub

  2. IMPACT LOAD • Shock load or sudden load is referred as impact load. • In order to select a material to withstand sudden intense below, we must measure a material’s resistance to failure in an impact test. • The ability to withstand an impact below is referred as toughness of the material.

  3. IMPACT TEST

  4. IMPACT TEST CURVE

  5. RESULT OF IMPACT TEST • From the curve, it is clear at high temperature, a higher amount of energy is required for the fracture. • Here fracture is ductile, means a lot of deformation before the fracture. • At low temperature, a small amount of energy is required for the fracture. • Here fracture is brittle, means a very small (practically no) deformation before the fracture.

  6. DUCTILE TO BRITTLE TRANSITION TEMPERAURE • The fracture mechanism changes from ductile to brittle over a narrow range of temperature. • This temperature is called DUCTILE TO BRITTLE TRANSITION TEMPERATURE (DBTT). • DBTT can be read from the impact test curve as the median temperature of the curve.

  7. MORE ABOUT DBTT • DBTT should be below the working environment temperature for a metal subjected to impact loading condition. • Not all materials have a distinct DBTT. • Usually BBC metals have DBTT while FCC metals don’t.

More Related