The Effect of the Thickness of Fe2 Al5 Phase Layer at Fe/Al Interface on the Mechanics Behavior of Hot Dip Aluminizing Coating
来源期刊：材料保护2004年增刊第2期
论文作者：YAO Mei XIA Yuan CUI Rui-yi CHEN Ling YU Sheng-xue
关键词：Fe2Al5phase; mechanics behavior; crack; hot dip aluminizing coating;
摘 要：Hot Dip Aluminized Coatings with different thickness were prepared on Q235 steel in aluminum solutions with different temperature for certain time. Through tensile tests and in-situ SEM observations, the effect of the coating's microstructure on the tensile strength of the samples was studied. It was disclosed at certain aluminum solution temperature,transaction layers mainly composed of Fe2 Al5 phase got thicker with time prolonging, and this changed initial crack's extending direction from parallel with to vertical with stretching direction. The change in crack direction decreased tensile strength of samples, thus made the coating easy to break. It was concluded that the existence of thick Fe2 Al5 phase layer was the basic reason for the lowering of tensile strength of the coating.
YAO Mei1，XIA Yuan2，CUI Rui-yi2，CHEN Ling3，YU Sheng-xue3
(1.College of Material Science and Engineering,Yanshan University, Qinhuangdao 066004, P.R. China;
2.Institute of Mechanics, Chinese Academy of Science, Beijing 100080;
3.Department of Environment Science & Chemical Engineering, Yanshan University, Qinhuangdao 066004)
摘要:Hot Dip Aluminized Coatings with different thickness were prepared on Q235 steel in aluminum solutions with different temperature for certain time. Through tensile tests and in-situ SEM observations, the effect of the coating''s microstructure on the tensile strength of the samples was studied. It was disclosed at certain aluminum solution temperature,transaction layers mainly composed of Fe2 Al5 phase got thicker with time prolonging, and this changed initial crack''s extending direction from parallel with to vertical with stretching direction. The change in crack direction decreased tensile strength of samples, thus made the coating easy to break. It was concluded that the existence of thick Fe2 Al5 phase layer was the basic reason for the lowering of tensile strength of the coating.
关键词:Fe2Al5phase; mechanics behavior; crack; hot dip aluminizing coating;
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