impact test lab report

Impact test of metals provides information on failure mode under high velocity loading conditions leading sudden fracture where a sharp stress raiser notch is present. However before the specimen tests can be started a hang down test and a swing down test were performed.

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Factors Affecting Charpy Impact Energy.

. Up to 24 cash back traction testing process. Results Display the test data in a Table. The lab used the Charpy testing rig.

Lab4 - lab report Preview text i ABSTRACT Charpy Impact testing is used in studying material toughness and most importantly it indicates a material ability to absorb energy and plastically deform without fracturing. The impactor head was allowed to hang at the 0 point and the voltage value at that point was recorded. When the striker impacts the specimen the specimen will absorb energy until it yields.

The test piece is hit by a striker carried on a pendulum which is allowed to fall freely from a fixed height to give a blow of 120 ft lb energy. Move the hammer up and lock it with the release lever. IMPACT TESTS AND FRACTURE TOUGHNESS.

Toughness is a property which is capacity of a material to resist fracture crack. In the Izod impact test the test piece is a cantilever clamped upright in an anvil with a V- notch at the level of the top of the clamp. Impact test is a test used in studying the toughness.

Parts such as shafts bolts anvils and dies are examples of items subjected to impact loading. To test ability of different types of spec impacts using two materials for impact test. Impact Testing involves the sudden and dynamic application of the load.

The brittle material absorbs less amount of energy and ductile material absorbs large amounts of energy. Starting position Pointer Pendulum End of swing h0 Specimen h Anvil. The height h to which the pendulum rises after striking and breaking the specimen is a measurement of the energy used in the breaking.

Plot impact energy versus temperature and brittleness versus temperature. Lab Report Impact Testing of Materials Charpy Dated. At this point the specimen will begin to undergo plastic deformation at the notch.

The impact test involve a pendulum figure 1 swinging down from a specified height h to hit the specimen and fracture it. Impact energy is a measure of the work done to fracture a test specimen. General Electric Co Pleasanton Calif.

Lab report The test has to be applied on a minimum of three specimens from the same batch. 2109 -2- any of fifteen different settingsThis is accomplished by employing 3 different release positions of the pendulum 30 45 and 60 and 5 different weight positionsThe difference between the initial and the final angle of the pendulum provides a measure of energy absorbed by the specimen. Expedited Impact Testing Services Are Available- Contact Us Today at 724-537-3131 Nadcap Accredited since 1992 A2LA ISO 17025 62101 62102 Accredited Measuring ranging less than 1 foot-pound to 300 foot-pounds Temperature ranges from -320F to over 2000F.

August 12 2021 Report by M UHAMMAD RAAFAY 12 3 1 028 2019 BS Metallurgy Materials Engineering bsmme1916pieasedupk Citations. The test specimen continues to absorb energy and work hardens at the plastic zone at the notch. The test is conducted to find whether the material is brittle or ductile.

In this study three stainless steel specimens at different temperature -78C 80C and 7C respectively were utilized. INTRODUCTION 11 The aim of the experiment The aim of the experiment is to determine the transition temperature and examine the variation in ductility with the temperature of the soft steel using the impact test machine charpy impact test machine and the square sample of v-notch. The energy absorbed at fracture is generally related to the area under the stress-strain curve which is termed as toughness in some references.

Lab Report Requirements 1. To develop an understanding of fracture toughness. 2 Izod Impact Test.

Measure and record the cross section area of the test specimen. Ensure that the knife and the test specimen holder are tightened properly. To investigate the influence of the notch shape on the notched bar impact work.

Impact Test Lab Report. Impact test is defined as the resistance of a material to rapidly sudden applied loads. The Charpy impact test also known as the Charpy V-notch test is a standardized high strain-rate test which determines the amount of energy absorbed by a material during fractureThis absorbed energy is a measure of a given materials notch toughness and acts as a tool to study temperature-dependent ductile-brittle transition.

Impact test conditions were chosen to represent those most severe relative to the potential for fracture namely 1 deformation at a relatively low temperature 2 a high strain rate ie rate of deformation and 3 a triaxial stress state which may be introduced by the presence of a notch. Ensure that the locking mechanism is holding the hammer pendulum. Place the test specimen onto the holder.

The following impact energy absorbed data table Table 4 shows the temperature of the specimens AISI 1045 in low temperature water bath high temperature oil bath and ambient temperature at the moment of the impact test the energy absorbed in foot-pound ftlbf and the energy converted to the International System of Units. Hang Down Control Test The hang down test was done first in order to establish the 0 position. GEAP-5775 DOE Contract Number.

Mild steel and carbon steel. Find DBTT of the steel that you tested. Discussion the questions will be answered in the lab report 1.

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