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The forming limit diagram of an ultra thin super ferritic stainless steel
Hyuk Jong Bong(봉혁종),Frederic, Barlat,Myung-Gyu Lee(이명규) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
The forming limit diagram (FLD) of a 0.1㎜-thick sheet of a ferritic stainless steel was determined using a modified Marciniak test. The conventional ASTM standard test method (ASTM E2218-2) was also tried with almost same conditions. However, the ASTM method produced undesired fracture at upper die radius and draw bead and wrinkling on the sheet specimens. The FLDs determined by the two methods are compared and advantages and disadvantages of the two methods are discussed