Impact fatigue and hardness lab statement template

4189408-25613300GENG211 ” Material Research Laboratory Report # 3: Impact of Charpy, Tiredness, & Hardness TestsSpring 2018-2019Submitted to Dr . Mohamad ZbibSection Number Group Number Date of Submitting Deadline: Sat, May 18, 2019 for 11: 00 PMName IDPart 1: Charpy Impact TestSummary: In this part, you must publish three sentences (1/2 page, single spaced) that include: 1 . 1 . Aim of the experiment1. 2 . Methodology1. 3. Main Results1. 5. Table 1: Fracture Strength Data to get the Analyzed Materials. ± (degrees) І (degrees) Crack Energy (J) Average Energy (J)All trials A W C Deb A W C D Brass info 3 several 3 a few 2 .

78 2.78 2.78 2.78 Al 64 68 56 75 1.47 1.28 1.75 1.02 Mild Steel 3 2 2 3 2.78 2.78 2.78 2.78 Cupper 54 71 46 46 1.82 1.20 2.07 2.07 1.5. Determine the average fracture energy for each materials, and fill it in the corresponding cell in Table 1.1.6. Discuss the difference in the fracture energy of the four different materials.1.7. Discuss the difference in fracture energy within the same material (for example, the changes in energy for Al).1.8. Table 2: Fracture Energy Data for a Specific Material at Different TemperaturesTemperature (°C) Impact Energy (J)100 89.375 88.650 87.625 85.40 82.9-25 78.9-50 73.1-65 66.0-75 59.3-85 47.9-100 43.3-125 29.3-150 27.1-175 25.01.9. Fracture Energy vs. Temperature CurvePlot the curve1.

10. Transition TemperatureDetermine the transition temperature from the plot.1.11. What is the difference between strength and toughness?Part 2: Fatigue Test2.1. Table 3. Fatigue Test DataStress (ksi) Cycles to Failure (x102)56.7 27155.4 40453.4 83652.8 153751.0 263949.5 400048.3 540047.5 135892.2. S-N Plot2.3. Fatigue Limit (Endurance Limit)Part 3: Hardness TestSummary:In this part, you must write three paragraphs (1/2 page, single spaced) that include: Purpose of the experimentThe reason for this examination is to measure the perpetual profundity of the indentation that is applied by a force on the indenter, therefore to look at and think about the hardness of various metals relying upon the profundity of the space. Experimental methodsIn the wake of setting the machine correctly, we raise the specimen to such an extent that it become in contact with the indenter by turning the big screw to such an extent that the center gage becomes vertical and modify the little screw to set the dial to zero. After that we press the switch and start the test. The last position of the dial pointer gives Rockwell hardness number which is straightforwardly identified with the profundity on indentation. At that point we take the recorded values legitimately from the screen. At that point we do a similar technique for the remaining materials. Main resultsAfter we are done doing the experiment, we recorded the values of the trail given by the machine. We calculated the average and we found out that material D has an average of 93.03 which is the highest while material A has an average of 70.54 which is the lowest. This proves that material D is the hardest one and material A is the weakest one. The increasing order of hardness was D >C >B >A which is proven in the stand below. Stand 4. Hardness ValuesRockwell Solidity (HRC)Trial Typical Standard DeviationMaterial 1 2 3 four 5 6th A seventy. 19 69. 75 75. 68 71. 03 75. 80 75. 79 70. 54 zero. 47B 84. 41 84. 08 84. 58 79. 90 84. 25 84. 91 83. 68 1 ) 88C eighty six. 62 86. 95 87. 43 87. 53 82. 34 87. 52 eighty six. 39 installment payments on your 02D 91. 35 91. 91 92. 02 91. 72 98. 89 92. 33 93. 03 installment payments on your 883. five. Determine the typical and the regular deviation of every sample in the Table four. Write the beliefs in the matching cells. Normal =16Trail6=91. 35+91. 91+92. 02+91. 72+98. 89+92. 336=93. 03 HRC. Common Deviation = (T-Tav)^(2)6-1For example of beauty D: Standard Deviation sama dengan 91. 35-93. 032++(92. 33-93. 03)^(2)6-1=2. 88 HRC. Discuss two factors that make clear the differences inside the measurements inside each sample. Surface impurities: They could be due to a previous indent in the surface area of the material that is used which could straightforwardly influence the estimations and recorded principles. Cleanliness: The area could have dust on it the boundary and may change the appraisal results. How many other techniques could be used to get considerably more accurate firmness measurements? The other indentation techniques which will give a better result rather than on a macro-scale (HRC) we need to use: Vickers Hardness Test: we are talking about micro-scale. Nano-Indenter: we are referring to Nano-scale. This test is somewhat more accurate compared to the previous types. 3. almost 8. Why some materials much harder than other folks? Some elements are harder than others as a result of presence of the grain limitations. The case is totally different in metals because of the rolling process and how atoms are lined up. Therefore , the greater grain limitations exist a lot more hardness we get. Moreover, a lot of metals will be mixture like iron, nickel etc… which usually definitely the actual material even more harder.

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