===== Hardness Lab ===== ===Alex, Jackie, Kun-Soo, Gary=== ==Before Heating== Rockwell C: ~6 (major load 150)\\ Rockwell B: hardness 93; tensile 96 psi (major load 100)\\ \\ Vicker test:\\ Average length(trial 1) = 119, Hardness 194(load of 200)\\ Average length(trial 2) = 115.5, Hardness 206(load of 200)\\ ==After heating and quenching in water== Rockwell B: ~107 (major load 100)\\ Rockwell C: hardness 25; tensile 120 psi (major load 150)\\ \\ Vicker Test:\\ Average length = 115, Hardness 207 (load of 200)\\ {{:start:classes:materialsscience:hardnesslab:img_9798.jpg?300|alex}} {{:start:classes:materialsscience:hardnesslab:img_9800.jpg?300|curious george}} ---------------------- ---------------------- ---------------------- ---------------------- ===Peter, Hannah, Matt, Jenna, and Henry=== {{:start:classes:materialsscience:hardnesslab:pa_ms_hd_polishing.jpg?300x200|pitter}} {{:start:classes:materialsscience:hardnesslab:pa_ms_hd_rockwell.jpg?300x200|pidder}} {{:start:classes:materialsscience:hardnesslab:pa_ms_hdtest_vickers.jpg?300x200|patter}} ==Prior to Heating=== Rockwell C: 14 - no listed tensile strenght value. Rockwell B: 94 = 98 kips of tensile strength (trial 1) and 91 = 91 kips of tensile strength (trail 2) *Rockwell C test used a major load of 150. *Rockwell B test used a major load of 100. Vicker: Average length was 113 - Hardness of 215 *Vicker tests performed with a load of 200. ==After Heating=== {{:start:classes:materialsscience:hardnesslab:pa_hdt_ph_m.jpg?300x200|}} Rockwell B: 23 - no listed data Rockwell C: 63 (trial 1) and 64 (trial 2) - no listed tnesile strength Vicker: Average length of 58 yielded a hardness of 802 *same loads applied as before the heating and quenching ---------------------- ---------------------- ---------------------- ---------------------- === Keith, Tyler, Andrew, Kevin, Daniel === {{:start:classes:materialsscience:hardnesslab:img_20121207_141744.jpg?200x300|}} {{:start:classes:materialsscience:hardnesslab:img_20121207_151103.jpg?200x300|}}{{:start:classes:materialsscience:hardnesslab:img_20121207_151811.jpg?200x300|}} Rockwell C: No Value on Table Rockwell B: 95= 101 kips of tensile strength Vicker: average length: 104.5 hardness: 252 === After Heating === {{:start:classes:materialsscience:hardnesslab:keith_quench.jpg?200x300|}} Rockwell B: score: 76 Tensile Strength: N/A Rockwell C: Trial 1: score: 38 Tensile Strength: 171 kips Trial 2: score: 41 Tensile Strength: 188 kips Vickers: Trial 1: Average Length: 94.5 Score: 308 Trial 2: Average Length: 89 Score: 346 === === ---------------------- ---------------------- ---------------------- ---------------------- ===Gerard, Piotr, Michael, Ratan, Mary, Tabitha=== Before\\ Rockwell C: 106 - no listed tensile strength value.\\ Rockwell B: hardness 96 = 103 kips of tensile strength (load:100)\\ \\ Vicker test:\\ Average length(trial 1) = 109.5, Hardness 228(load of 200)\\ Average length(trial 2) = 109, Hardness 231(load of 200)\\ After\\ Rockwell C: 67.5 - no listed tensile strength value.\\ Rockwell B: hardness 113.5 - too high for chart (tensile strength > 116) (load:100)\\ \\ Vicker test:\\ Average length(trial 1) = 89.5, Hardness 342(load of 200)\\ ---------------------- ---------------------- ---------------------- ---------------------- ===Tensae Andargachew, David Chen, Nicholas Mitchell, Jae Song, Yeeho Song=== {{:start:classes:materialsscience:hardnesslab:matscihardnessnickdavidyeehojae.jpg|}} {{:start:classes:materialsscience:hardnesslab:matscihardnessfinalnickdavidyeehojae.jpg|}} ---------------------- ---------------------- ---------------------- ---------------------- ===Amanda, Jeff, Jon, Kristin, Pnina=== {{:start:classes:materialsscience:hardnesslab:datatables.jpg|}}\\ {{:start:classes:materialsscience:hardnesslab:1210120924_1_.jpg?200x300|}}{{:start:classes:materialsscience:hardnesslab:quenching.jpg?400|}}\\ [[http://www.youtube.com/watch?v=35by4qUR2os&feature=youtu.be|Video of Quenching]] ---------------------- ---------------------- ---------------------- ---------------------- ===Stanley George, Quinee Quintana, Eric Ramos=== ==Prior to Heating, Quenching== Rockwell B (Major Load of 100) - 95\\ Rockwell C (Major Load of 150) - 12\\ Vickers (Load of 200) - Hardness of 223, Average length of 111\\ ==After Heating, Quenching== (Quenched for 42 seconds in water) Rockwell B (Major Load of 100) - 21\\ Rockwell C (Major Load of 150) - 63 (First Trial), 59 (Second Trial)\\ Vickers (Load of 200) - Hardness of 159, Average length of 132.75\\ ---------------------- ---------------------- ---------------------- ---------------------- ===Raymond Fu, Jimmy Lastihenos, Eugene Wang, James Sarjeant, Jimmy Espinoza=== ==Before Heating, Quenching== Rockwell B (Major Load of 100): Trial 1 - 93 Trial 2 - 96\\ Vickers (Major Load of 200): Trial 1 - 213, Trial 2 - 181 ==After Heating, Quenching== Rockwell B (Major Load of 100): Trial 1 - 89 Trial 2 - 94.5\\ Vickers (Major Load of 200): Trial 1 - 174, Trial 2 - 193 ---------------------- ---------------------- ---------------------- ---------------------- ===Linn Mercier, Sivan Shemesh, Emily George, Sasha Vera, Malcolm Dell=== Follow the link to our hardness test presentation... [[https://docs.google.com/file/d/0B8xUNUHY_1-HRXRrcFc2d2xtbHM/edit]]