Investigation of Mechanical Properties and In Vitro Corrosion of Bulk Nanostructured Metal Produced by Equal Channel Angular Pressing
文献类型： 会议论文
第一作者： Zahiruddeen Salam Zahari
作者： Zahiruddeen Salam Zahari 1 ; Dayangku Noorfazidah Awang Shri 1 ; Akiko Yamamoto 2 ;
作者机构： 1.Human Engineering Group, Engineering Collage, Universiti Malaysia Pahang, 26300 Gambang, Kuantan, Pahang, Malaysia
2.Biomaterials Unit, International Center for Material Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-004, Japan
关键词： Mechanical Properties;ECAP;BE
会议名称： International Conference on Bioengineering and Technology
主办单位：
页码： 060037-1-060037-7
摘要： ECAP(Equal Channel Angular Pressing) process on 316L stainless steel was done in this study using two different channel angles 120° and 126° after all samples were heat treated. There were three experiments ran in this study optical microscope analysis, hardness test and electrochemical measurement for three conditions samples which are before ECAP (BE), 120° ECAP and 126° ECAP. Metallurgical optical microscope was used to analyse the changing in grain size. The hardness test is examined using Wilson Vickers Hardness Test Machine with 100 gf load subjected on the samples about 10 seconds. Electrochemical measurements are done to observe the corrosion behavior of the samples. Two electrolytes were used during the test which are 0.9%NaCl and E-MEM+10%NCS cell culture medium solution. An incubator is used during the experiment for the samples experience a real human body environment (37°C) in two conditions which is for 0.9%NaCl and 5% CO2 for cell culture medium on 316L stainless steel. As a result, optical analysis shows that the grain size for both 120° ECAP and 126° ECAP samples had refined with an elongated grain compared to BE for both materials. However, 120° ECAP shows a slightly better refinement grain size than 126° ECAP. Besides, in hardness test results, the 126° ECAP shows the increment value of Vickers hardness from others. 120° ECAP and 126° ECAP has 27.67% and 28.84% hardness increment, respectively. Meanwhile, for electrochemical tests show that ECAP influences the corrosion properties of 316L stainless steel. Current density(I_(corr)) is reduced by 120° ECAP (24.6±4.9 nA/cm2 and 37.6±24.3 nA/cm2) and 126° ECAP (107.0±82.0 nA/cm2 and '56.6±27.2 nA/cm2) in both conditions tested (0.9%NaCl and E-MEM+10%NCS), but 120° ECAP improves better than 126° ECAP for both conditions(lower results values). The reduction of I_(corr) by ECAP process is smaller in cell culture medium than 0.9% NaCl. As a conclusion, 120° ECAP shows the best perform
分类号： Q81-532
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