A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
K N, Mohandas
- Study on Dimensional Inconsistency of Titanium Alloy (Grade 5) During Machining
Authors
1 Department of Mechanical Engineering, M S Ramaiah Institute of Technology, Bangalore., IN
Source
Journal of Mines, Metals and Fuels, Vol 71, No 1 (2023), Pagination: 94-98Abstract
Machining is the process of removing material from a work piece, in the form of chips, to obtain the final part in its desired shape and size. Various aerospace materials such as aluminum, steel, and titanium etc. can be mainly shaped through machining process. Titanium alloys also find larger adoption in areas like bio-medical and automotive mainly because of their inherent high specific strength and consistent corrosion resistance. Machining Ti-6Al-4V-grade 5 has been difficult due to a number of its characteristics like poor conductivity of heat, strong and undesirable chemical reactivity with cutting tool materials at operating/ cutting temperature, its work hardening characteristics and very low modulus of elasticity. Due to low modulus of elasticity, the dimensional inconsistency of thin-walled titanium grade 5 parts that occur after machining is an important topic/issue to be addressed since it has greater effect on the work piece surface quality, cutting tool wear and the cutting forces involved. While milling the thin-walled parts numerous cutting parameters like cutting speed, feed rate, depth of cut, cutting tool materials and cutting fluids were used and the resulting output variables like cutting force, surface finish and the change in flatness levels were observed and discussed.Keywords
Dimensional Inconsistency of Titatanium, Numerous Cutting Parameters, Deflecting/Flatness Values.References
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Authors
1 Associate Professor, Dept. of Mechanical Engineering, Ramaiah Institute of Technology, Bangalore, Karnataka, India., IN
2 Professor & Head, Dept. of Mechanical Engineering, G. Madegowda Institute of Technology, Mandya, Karnataka, India., IN
3 Senior Grade Lecturer, Dept. of Mechanical Engineering (W&SM), SJ Polytechnic, Bangalore, Karnataka, India., IN
Source
Journal of Mines, Metals and Fuels, Vol 70, No 10A (2022), Pagination: 226-234Abstract
In the present study, medium carbon low alloy (MCLA) steels like AISI 5140 (EN18) and AISI 4140 (EN19) are treated in different quenching media under solutionizing temperature of 855°C. Quenched in SAE 250 oil, polyethylene glycol (PEG) (10% and 30%), and water. The quenched samples are step-tempered at 575°C and at 220°C sequentially with 60 minute soaking time. BHN, YS, UTS and tensile toughness are determined for the untreated and heat-treated samples. It is found that there is an excellent correlation, with correlation coefficients of 0.97. The standard generalized equation for these two steels are established. Tensile toughness = 19000 + 12 BHN- 215 El. The study revealed that the PEG is better in terms of cost, fire-resistant and biodegradable. 30% polymer quenched samples result in better tensile toughness properties as compared to 10% polymer quenched samples.
Keywords
Medium Carbon Low Alloy Steel (MCLA), AISI 5140, AISI 4140, Polyethylene Glycol (PEG), Tensile Toughness, Percentage Elongation.References
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