28 Aug '17, 11am

New process for lower-cost steel with high strength and high ductility

New process for lower-cost steel with high strength and high ductility

New process for lower-cost steel with high strength and high ductility 28 August 2017 A Hong Kong-Beijing-Taiwan mechanical engineering team led by Dr Huang Mingxin from the University of Hong Kong (HKU) has developed a strategy to develop both high strength and high ductility in inexpensive, medium Mn (Manganese) steel. Its material cost is just one-fifth of that of the steel used in current aerospace and defense applications. Cold-rolling followed by low-temperature tempering developed steel with metastable austenite grains embedded in a highly dislocated martensite matrix. This deformed and partitioned (D&P) process produced dislocation hardening, but retained high ductility both through the glide of intensive mobile dislocations and by allowing the control of martensitic transformation. The as-developed D&P steel possessed an ultra-high yield strength of 2.21 GPa and 2...

Full article: http://www.greencarcongress.com/2017/08/20170828-hku.html

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