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URN etd-0816104-161421 Statistics This thesis had been viewed 1972 times. Download 17 times. Author Yi-Je Chen Author's Email Address No Public. Department Materials Engineering Year 2003 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 97 Title Effect of Electroless Nickel on Erosion Wear and Mechanical Property of 7075-T6 Al-Alloy Keyword Erosion Wear Electroless Nickel 7075-T6 Al-Alloy 7075-T6 Al-Alloy Electroless Nickel Erosion Wear Abstract 7075-T6 Al-alloy is widely applied in structural and air material because of its high weight rate. Solid particle erosion is a serious and costly problem in many aeronautical applications.。Surface treatment would contribute to the promotion of 7075 Al-alloy. Electroless nickel (ENi) plating is widely applied in aeronautical、motor and chemical industry owing to their excellent corrosion and wear resistance and high hardness.。Thus, this present study directed at 7075-T6 Al-alloys to impose different P content of electroless nickel coatings. Applying erosion、wear and tension test to explore mechanical property of 7075-T6 without and with ENi coating conditions.
The experiment result shows that the Hi-P specimen is more wear resistances than Me-P specimen and, we can increase the coating thickness to protect substrate. Besides, the tensile strength of the Me-P specimen is higher than the Hi-P specimen. The erosion resistance of the ENi coating is not well for the solid particles erosion. Finding thatcoatings are broken when starting test. Discussion of the erosion rate that will decrease as the incident angle increased from lower incident angle(15o) to highest incident angle(90o) for 7075-T6 Al-alloy.And the primary mechanism is cutting at low angles(15o), and indentical craters at high angles(90o). Besides, it’s because that combine of cracks, indentical craters, cutting and so on happened at 45o,resulting in maximum depth of erosion.
Advisor Committee Cheng-Hsun Hsu - advisor
Chia-Jung Hu - co-chair
Hui-Ping Feng - co-chair
Files Date of Defense 2004-07-19 Date of Submission 2004-08-16