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LOSE k. On Testing Unit: Remove fractured specimen. 1. Tum OFF computer, then turn OFF testing unit. PART A-TENSILE TESTING OF HARDENED 6061-T6 ALUMINUM ALLOY a. For the reduced middle section of a precipitation-hardened 6061-T6 aluminum alloy test specimen, measure the original diameter D to the nearest 0,001 inch, and the original length L, to the nearest 0.01 in, recording the data where indicated (nominal length and nominal diameter are L = 2.00 in and D=0.200 in); USE A DARK PENCIL TO RECORD THIS AND ALL SUBSEQUENT DATA, INCLUDING THAT ON THE GRAPH. b. Carry out the tensile test using the MTS testing machine as already described. c. Assemble the broken specimen together, mcasure the final length L, and record it where indicated. d. Use the printed load-versus-elongation curve to extract data points to re-plot as a stress-strain curve:. up to ten points may be used. Original diameter D (to nearest 0.001in) = 0.200 in Original cross-section area A (to nearest 0.0001 in) = ME ra Original length L. (to nearest 0:01 in) - 2.00 in Elongation (to nearest 16.) = [(L, -L.)/L]X100 Final length L(to nearest 0.01 in)- 2,24 in Elongation 3 (in) Load P (lb) Straine 87 ifto the cards 0.001) Stress g = P! A (lbina = psi) to the ricarest 500 psi) 0.010 0.020 0.030 1/00 امر 7230
Page 3 of 8 7300 2.090 0.770 0.230 0,260 1340 1/20 870 PARTS B AND D - ANALYSIS OF THE EXPERIMENTAL TENSILE RESULTS a. For each of the two specimens in parts A and C, cakulate the cross-section area to the nearest 0.0001 in and the elongation [(L, -L.)/L.]x100 to the nearest 1%, recording where indicated. b. Complete the tables in parts A and C. by calculating and recording the strain E = S/L to the nearest 0.001 and the stress o = P/A to the nearest 500 psi. c. Using the graph paper (with labeled axes) included within this lab sheet for both specimens, plot the stress o versus the strain E for using dark crosses (+) to indicate the actual data points and drawing a smooth solid curve, or a straight line where appropriate, that passes as close as possible hetween the data points d. Mark the peak point on each curve with a dark solid circle () and label this point as "UTS" for Ultimate Tensile Strength, noting and recording its value to the nearest 500 psi in the box within the graph, also adding the elongation in the same box e. Label the two curves as "6061-T6 Aluminum Alloy" and "6061-0 Aluminum Alloy". h
Pagesorg PART C-TENSILE TESTING OF ANNEALED 6061-0 ALUMINUM ALLOY a. For the reduced middle section of an annealed 6061-0 aluminum alloy test specimen, measure the original diameter D to the nearest 0.001 inch and the original length L, to the purest oLin. recording the data where indicated (nominal length and nominal diameter are L, -2.00 in and D=0.200 in): USE A DARK PENCILTO RECORD THIS AND ALL SUBSEQUENT DATA, INCLUDING THAT ON THE GRAPH. b. Carry out the tensile test using the MTS testing machine as already described. c. Assemble the broken specimen together, measure the final length L, and record it where indicated. d. Use the printed load-versus-elongation curve to extract data points to re-plot as a stress-strain curve; up to ten points may be used. Original diameter D (to nearest 0.001in) = 0.200 in Original cross-section area A (to nearest Olo01 in) = na Original length 1, (to nearest 0.01 in) = 2.00 in Elongation (to nearest 19) = [(L, -L)/L,]x100 Final length L, (to nearest 001 in) = 2.38 m KON Elongation 5 (in) Load P (15) Sirain & + s Kto the means OLOOD Stress Ở = P/A (b/in = psi) to the nearest 500 psi) 0.000 0 0.005 0.020 0,070 0,120 LP 230 390 480 soa 480 360 270 0.220 0.270 0.320 0.345
T-102%20Lab%20Data-Tensile, Shear, Hardness-F20.pdf D Page view A Read aloud 1 Add text V Draw Page 7 Precipitation-hardened 6061-T6 aluminum alloy Pin diameter = 0.188 in Shearing area (pin cross-section area = Peak load = 994 10 Ultimate shear strength psi Annealed 6061-0 aluminum alloy Pin diameter = 0.188 in Shearing area (pin cross-section area= Peak load = Ultimate shear strength 50% ] DSE HARDNESS TESTING a. With the Wilson hardness testing machine set up for the Rockwell B hardness test. start by ensuring that the chronie plated handle fat the lower right side of the machine) is up towards you) Place a test specimen oleach of the two aluminum alloys on the anvil with all contact surfaces clean, and any previerus indentations at least four indentation diameters away from the location or the new indentation c. Raise the anvil gradually by turning the 3-spoke handle clockwise, until the 1/16 inch sieel ball andenter makes contact with the specimen, and continue until the small needle within the dial iar the front of the machine) points to the black del. and the large needle is pointing vertically up and is within the yellow-colore region, at which stage the 10 ky minor load has been applied: d. Tum the knurled wheel tunder the 3-spoke handle, so that the large needle peints to the "SET" print. c. Press the metal-finish lever below the knurled wheel to apply the 100 kg major lund. † Alter the large needle stabilizes, pull the chrome-plated handle up (lowards you), removing the 100 kg major lead and leaving the 10 kg minor load: Alter the large needle stabilizes. read thic Rockwell B hardness from the red scale, to the nearest whole number, and recanil in the following table taking an average of leist twareudis tur cach seinen h Turn the spoke handie countr-clockwise te lower the amul removing the minor load Precipitation-liardened 6061-T6 aluminum alloy HRB 53 Annealed 6061-0) aluminum alloy HRB = 30