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The TWIP Steel Research Work at Present

Ma Fengcang1,2,Feng Weijun1,Wang Li1,Zhang Di2(1.Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China;2.Shanghai Jiaotong University,Shanghai 200030,China)  
The present situation and the progress made in research on twinning induced plasticity(TWIP) steel are summarized.The different composition systems of TWIP steel,i.e.Fe-Mn-Al-Si,Fe-Mn-C and Fe-Mn-Al-C steels are introduced,together with the effects of each alloying element.The composition design based on the stacking fault energy,the method used to calculate stacking fault energy,influencing factors and the relationship between stacking fault energy and the TWIP effect are described.The TWIP steel's microstructure,mechanical properties and challenges met in its production and treatment are presented.
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