%0 Journal Article
%T Characterization of a low carbon low alloy steel by nanoindentation<br>一种低碳低合金钢的纳米压痕表征
%A SONG Hongwei
%A SHI Bi
%A WANG Xiufang
%A ZHANG Junbao
%A <br>宋洪伟
%A 史 弼
%A 王秀芳
%A 张俊宝
%J 金属学报
%D 2005
%I 
%X A low carbon low alloy steel with two different types of microstructures was characterized by nanoindentation. The results indicate that the average nanoindentation hardness of martensite is at least 70% higher than that of ferrite in the dual-phase sample. Since the ultrafine martensite grain is embedded in the soft ferrite matrix, the nanoindentation hardness of martensite exhibits a substrate-effect when the indentation depth is over 40 nm. Due to more carbon atoms partitioning to austenite during intercritical process, carbon content of martensite in the dual-phase sample may be several times higher than the nominal carbon content of the steel, which makes the average nanoindentation hardness of martensite in the dual-phase sample is at least 30% higher than that in the fully martensitic sample. In addition, the possible effects of carbon partitioning on Poisson ratio and Young's modulus of martensite were discused briefly.
%K steel
%K ferrite
%K martensite
%K nanoindentation
%K hardness<br>钢
%K 铁素体
%K 马氏体
%K 纳米压痕
%K 硬度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=486FBFE0E1C54FC8&yid=2DD7160C83D0ACED&vid=2001E0D53B7B80EC&iid=38B194292C032A66&sid=EBD6B792C9111B87&eid=211C7E02AC474301&journal_id=0412-1961&journal_name=金属学报&referenced_num=4&reference_num=8