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)

alex curious george





Peter, Hannah, Matt, Jenna, and Henry

pitter pidder 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

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

Rockwell C: No Value on Table

Rockwell B: 95= 101 kips of tensile strength

Vicker: average length: 104.5 hardness: 252

After Heating

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





Amanda, Jeff, Jon, Kristin, Pnina

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

 
start/classes/materialsscience/hardnesslab/start.txt · Last modified: 2012/12/21 16:18 by svera
 
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