Fatigue behavior of press hardened Al-Si coated high strength steel  

作　　者：Wang Zijian Gui Zhongxiang Zhang Yisheng 

机构地区：[1]State Key Laboratory of Materials Processing and Die & Mould Technology,Huazhong University of Science and Technology

出　　处：《Engineering Sciences》2014年第5期28-32,共5页中国工程科学（英文版）

基　　金：National Natural Science Foundation of China （No. 51275185, No. 51405171）; National Basic Research Program of China （No. 2010CB630802-3）; Graduate Innovation and Entrepreneurship Fund of Huazhong University of Science and Technology （No. 0109070112）; Fundamental Research Funds for the Central Universities （No. 0118110621）

摘　　要：The fatigue behavior of press hardened Al-Si coated high strength steel has been investigated,and the fatigue strength turns out to be about 1 000 MPa.Surface morphology of fractured and non-fractured specimen has been observed,and the coating shows significant influence on the fatigue behavior.The difference of elastic modulus between coating and substrate led to the main cracks perpendicular to the loading direction.The coating close to fracture exfoliated thinly,while the coating far away from the fracture kept integrated.Though the specimen was polished to obtain high surface quality,3 types of cracks occurred during the fatigue test.What’s more,inclusion particles were proved to play a crucial role in causing these cracks.

关 键 词：fatigue behavior high strength steel Al-Si coating CRACK 

分 类 号：TG146.21[一般工业技术—材料科学与工程] U465.11[金属学及工艺—金属材料]