1. Laboratory for Multiphysics & Multiscale Systems 2014. 09. 29 20071080 20091813 20091876 20111821 [2014 Fall Creative Capstone Design] Kwon, Jaehwan Kim, Junhyung Hyun, Seunghyeop Kwon, Soonhyun

2. 1.Introduction – Clarifying Project 2.Experiment Results - Surface hardness testing 3. Preliminary Paper Search for Project 4. Reference

3. 1.Introduction – Clarifying project Hardness Characteristics of real shape data ② ① ① Depth ② Length ③ Size of Area ….. Verification Real shape data Estimate depth from Ultrasonic test Predict shape data from Estimated depth Correlation

4. Average data chart Unit : Hv Part Crank # 1J1P2J2P3J3P4J4P5J 1 642.4610.5616633.6645.7609.3602.3639.9652.2 2 602.9613.4594637.7575.8620.1644.9645.5640.4 3 716.3610.5630.9626.9642.1635.2593.0665.9593.4 4 619.5615.5620.3608.8692.8621.8607.6653.6631.5 5 641.5609.1606.6623.8578.7632.1650.4654.9598 Testing # Hardness ( Hv ) 1 3130.11595.9 2 3332.57517.3 3 30.4530.48599.3 4 30.4230.36602.4 D1 D2 Crank #5, Part 3P

5. Correlation between Ultrasonic and Hardness Measurements in Aged Aluminum Alloy 2024 - ROSEN, M., et al. Materials Science and Engineering, 1985, 74.1: 1-10. Fig. 1. Correlation between hardness and ultrasonic attenuation for aluminum alloy 2024 dependence on pre- aging treatment sequence: sequence A(●), sequence B(X) Fig. 2. Correlation between ultrasonic attenuation and hardness for aluminum alloy 2024 pre-aged by sequence A and age hardened by temper T351A Difference – Phase transition occurred in whole part

6. Numerical simulation of continuous cooling of a low alloy steel to predict microstructure and hardness - KAKHKI, M. Eshraghi; KERMANPUR, A.; GOLOZAR, M. A. Modelling and Simulation in Materials Science and Engineering, 2009, 17.4: 045007. Fig. 3. Simulated distribution of (a) ferrite, (b) pearlite, (c) bainite, (d) martensite Idea – Predicting phase transition could be possible. Fig. 4. Predicted and measured values of hardness in Vickers according to distance from the quenched end of the Jominy test of 4140 steel.

7. - ROSEN, M., et al. Correlation between ultrasonic and hardness measurements in aged aluminum alloy 2024. Materials Science and Engineering, 1985, 74.1: 1-10. - KAKHKI, M. Eshraghi; KERMANPUR, A.; GOLOZAR, M. A. Numerical simulation of continuous cooling of a low alloy steel to predict microstructure and hardness. Modelling and Simulation in Materials Science and Engineering, 2009, 17.4: 045007.

8. Q & A