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10 literature reviews 2 News topics

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  • 1. Fundamentals of Mechanical Engineering Experiments for Graduate Study By Numchoak Sabangban Department of Mechanical Engineering Khonkaen University 1

2. Paper topic reviews Role and Importance of Forming Technology of High Strength Steel (HSS) for Automotive Part Making Industry. Tribology of Hot Forming Tool and High Strength Steels. The Study Springback of Advanced High Strength Steel Sheet after Warm and Hot Forming. Evaluation of stamping lubricants at various temperature levels using the ironing test. Evaluation of stamping lubricants in forming advanced high strength steels(AHSS) using deep drawing and ironing tests. Evaluation of stamping lubricants using the deep drawing test. Investigation of galling in forming galvanized advanced high strength steels (AHSSs) using the twist compression test (TCT). Influence of work material proof stress and tool steel microstructure on galling initiation and critical contact pressure. Springback prediction in sheet metal forming of high strength steels. 2 3. Introduction 3 4. Introduction 4 5. Introduction 5 6. Introduction One things to improve this automotive industry is car structure. 6 7. Introduction The problem in car structure metal forming. 7 8. Introduction Punch Example during process. Die 8 9. Tribology of Hot Forming Tool and High Strength Steels Authors : Prof. Braham Prakash and Prof. Elisabet Kassfeldt Method 9 10. Tribology of Hot Forming Tool and High Strength Steels Graph and conclusion The operating temperature has been shown to influence the friction and wear behaviour of tool steel and UHSS tribo-pairs. Generally, friction is reduced at elevated temperatures while wear increases with temperature. The most significant contributing wear mechanisms are adhesive and abrasive wear. Plasma nitriding of the tool steel is effective in reducing friction and wear at elevated temperatures and provides protection against severe adhesive wear (i.e. galling). 10 11. The Study Springback of Advanced High Strength Steel Sheet after Warm and Hot Forming Authors : Phaisin Jaitiang and Dilok Sriprapai Method and materials : using HSS (SPFC 980Y) 11 12. The Study Springback of Advanced High Strength Steel Sheet after Warm and Hot Forming Graph 12 13. The Study Springback of Advanced High Strength Steel Sheet after Warm and Hot Forming Conclusion At high temperature was cause to reduce springback. When temperate to 900 C was not have springback. During temperature around 700 C the materials hardness reduce to 19.65 %. The surface oxide can observe when temperature higher 500 C. 13 14. Evaluation of stamping lubricants at various temperature levels using the ironing test Authors : Shrinidhi Chandrasekharana, Hariharasudhan Palaniswamya,Nitin Jaina, Gracious Ngaileb, Taylan Altana Method and materials : Improve the materials flow into the die, reduce wear and galling in the die and obtain good finish the part by simulation and experiment by using material AKDQ. Evaluate : Lub and temperature reach to 200 C. 14 15. Evaluation of stamping lubricants at various temperature levels using the ironing test Graph 15 16. Evaluation of stamping lubricants at various temperature levels using the ironing test Conclusion At both room temperature and elevated temperature, Lub B (the zinc phosphate coating + sodium soap),performed best followed by Lub A (the dry film) and Lub E (pre-emulsified with solid lubricant), while the emulsions failed (scratching and galling) due to the high interface pressures. When starting process in FEM the friction factor was higher because the contact of material is metal to metal. The reduction ratio at elevated temperatures is smaller than that at room temperature. A new ironing ring, which compensates for thermal expansion may need to be designed. 16 17. Evaluation of stamping lubricants in forming advanced high strength steels (AHSS) using deep drawing and ironing tests Authors : Hyunok Kim, Taylan Altan and Quingguang Yan . Materials and method : Using HSS(DP 690) to evaluate performance of lubricant in the DD and ironing process by using FEM and experiment. 17 18. Evaluation of stamping lubricants in forming advanced high strength steels (AHSS) using deep drawing and ironing tests Graph 18 19. Evaluation of stamping lubricants in forming advanced high strength steels (AHSS) using deep drawing and ironing tests Conclusion Based on performance evaluation criteria used in deep drawing and ironing tests, Lubricants type Polymer-based lubricant with EP additive which the best performance to this process. The FE will predict the black contact pressure in the blank holder to evaluate the performance of lubricant in the exit of production. 19 20. Evaluation of stamping lubricants using the deep drawing test Authors : Hyunok Kim, Ji Hyun Sung, Rajesh Sivakumar and Taylan Altan. Material and method : Using 5 Lubricant (A, B, C, D and E) In this research will evaluate the performance of lubricant to find the minimum friction and successful drawing. 20 21. Evaluation of stamping lubricants using the deep drawing test Graph and discussion Based on various evaluation criteria, Lub A was most effective regardless of testing speeds and BHFs. Lub A may be a good lubricant for most severe deep drawing conditions. However, Lubes B and C were relatively effective for use in moderate deep drawing conditions. 21 22. Investigation of galling in forming galvanized advanced high strength steels (AHSSs) using the twist compression test (TCT) Authors : Hyunok Kima, Jihyun Sunga, Frank E. Goodwinb and Taylan Altan. Materials and method : Using materials DP500, 600, AKDQ and DDS to twist compression test and FE to find the performance of different galvanize coating and lubricant to find the galling effect. 22 23. Investigation of galling in forming galvanized advanced high strength steels (AHSSs) using the twist compression test (TCT) Graph 23 24. Investigation of galling in forming galvanized advanced high strength steels (AHSSs) using the twist compression test (TCT) Conclusion At 100 MPa, DP600 with Lub A showed moderate galling and 170 MPa Lub B showed the best effectiveness in reduction galling. Lub B showed less powdering (i.e. zinc coating and carbon residue) than Lub A for most galvanized coatings, however AKDQ HDGA showed less powdering with Lub A at 170MPa. the maximum temperature at the tool workpiece interface was not found to be very severe to decrease the lubricant viscosity. The galling cause to powdering and COF. Its important to surface finish with acceptable range to prevent any ploughing effect of the contact area. 24 25. Behavior of high strength structural steel at elevated temperatures Authors : J. Chen, B. Young and B. Uy Materials and method : Using HSS ASTM A514 (DP 690) to find mechanical properties (such as yield and ultimate tensile strength) by using tensile test and varying temperature. 25 26. Behavior of high strength structural steel at elevated temperatures Graph and conclusion. The temperature was cause to change mechanical properties of materials from 400 C or higher with the exponential curve. 26 27. Influence of work material proof stress and tool steel microstructure on galling initiation and critical contact pressure Authors : Patrik Karlsson n, PavelKrakhmalev, AndersGaard and JensBergstrom Materials and method : Using stainless steel to specimen and used IC (ingot cast) and PM (Powder metallurgy) to tool materials, and predict galling form chemical position by proof stress and contact pressure. Experiment by pin on disc and FEA to verify ( galling = P > Pf ) 27 28. Influence of work material proof stress and tool steel microstructure on galling initiation and critical contact pressure Graph and conclusions If tests run at P > Pcr , galling was detected within the selected distances, while for tests run at P < Pcr , galling was not observed. 28 29. Springback prediction in sheet metal forming of high strength steels Authors : B. Chongthairungruang, V. Uthaisangsuk, S. Suranuntchai and S.Jirathearanat Materials and method : Using AHSS (JSC590R and JSC780Y) to find the springback by U shape bending test in FEM and find materials properties by tension and compression cyclic test . 29 30. Springback prediction in sheet metal forming of high strength steels 30 31. Springback prediction in sheet metal forming of high strength steels Graph and conclusions The cyclic test was successfully performed for determining materials parameters of the kinematic model. The pre-strains between 9 and 11 percent. The differences of stress distributions on the top and bottom surface of the formed samples significantly affected the sidewall curl, in particular the high strength steels. The AHS steel exhibited very large range of the elastic strain recovery. 31 32. Thanks for attentions 32 33. References Vitoon Uthaisangsuk.(2013). Role and Importance of Forming Technology of High Strength Steel (HSS) for Automotive Part Making Industry. Guideline for forming Advance High strength Steels, December 2013. Jens Hardell., Braham Prakash., and Elisabet Kassfeldt. Tribology of Hot Forming Tool and High Strength Steels. Lulea University of technology. Phaisin Jaitiang., and Dilok Sriprapai. The Study Springback of Advanced High Strength Steel Sheet after Warm and Hot Forming. Chandrasekharan, S., Palaniswamy, H., Jain, N., Ngaile, G., and Altan, T. (2005). Evaluation of stamping lubricants at various temperature levels using the ironing test. International Journal of Machine Tools and Manufacture, vol.45(4-5), pp.379-388. Kim, H., Altan, T., and Yan, Q. (2009). Evaluation of stamping lubricants in forming advanced high strength steels (AHSS) using deep drawing and ironing tests. Journal of Materials Processing Technology, vol.209(8), pp. 4122-4133. Kim, H., Altan, T., and Yan, Q. (2007). Evaluation of stamping