Dr.Chetan Kishor Tembhurkar
@pcenagpur.edu.in
ASSISTANT PROFESSOR
Priyadarshini College of Engineering nagpur
RESEARCH, TEACHING, or OTHER INTERESTS
Mechanical Engineering, Industrial and Manufacturing Engineering
Scopus Publications
Scopus Publications
Sachin P. Ambade, Chetan K. Tembhurkar, Awanikumar Patil, Atul V. Tidke, Sagar D. Shelare, Chander Prakash, Milos B. Djukic, Nima Khosravi, and Prabhu Paramasivam
Elsevier BV
Sachin Ambade, Chetan Tembhurkar, Akshay Rokde, Santosh Gupta, Sagar Shelare, Chander Prakash, Lovi Raj Gupta, and Vladimir A. Smirnov
Elsevier BV
Chetan Tembhurkar, Sachin Ambade, Ravinder Kataria, Jagesvar Verma, and Abhijeet Moon
Emerald
Purpose This paper aims to examine dissimilar joints for various applications in chemical, petrochemical, oil, gas, shipbuilding, defense, rail and nuclear industry. Design/methodology/approach This study examined the effects of cold metal transfer welding on stainless steel welds for 316L austenitic and 430 ferritic dissimilar welds with ER316L, ER309L and without (autogenous) fillers. The microstructural observation was done with an optical microscope. The mechanical test was done to reveal the strength, hardness and toughness of the joint. The electrochemical polarization tests were done to reveal intergranular and pitting corrosion in the dissimilar joints. Findings This microstructural study shows the presence of austenitic and ferritic phases with vermicular ferrite for ER309L filler weld, and for ER316L filler weld specimen shows predominately martensitic phase in the weld region, whereas the autogenous weld shows lathy ferrite mixed with martensitic phase. Mechanical test results indicated that filler welded specimen (ER316L and ER309L) has relatively higher strength and hardness than the autogenous weld, whereas ER316L filler weld exhibited the highest impact toughness than ER309L filler weld and lowest in autogenous weld. The electrochemical corrosion results displayed the highest degree of sensitization (DOS) in without filler welded specimen (45.62%) and lower in case of filler welded specimen ER309L (4.95%) and least in case of ER316L filler welded specimen (3.51%). The high DOS in non-filler welded specimen is correlated with the chromium carbide formation. The non-filler welded specimen shows the highest pitting corrosion attack as compared to the ER316L filler weld specimen and relatively better in ER309L filler welded specimen. The highest pitting corrosion resistance is related with the high chromium content in ER309L composition. Originality/value This experimental study is original and conducted with 316L and 430 stainless steel with ER316L, ER309 and without fillers, which will help the oil, shipbuilding and chemical industries.
Sachin Ambade, Chetan Tembhurkar, Awanikumar P. Patil, Prakash Pantawane, and Ravi Pratap Singh
Emerald
PurposeThe purpose of this study is on AISI 409 M ferritic stainless steel (FSS) which is developing a preferred choice for railway carriages, storage tanks and reactors in chemical plants. The intergranular corrosion behavior of welded SS 409 M has been studied in H2SO4solution (0.5 M) with the addition of NH4SCN (0.01 M) with different heat input. As this study is very important in context of various chemical and petrochemical industries.Design/methodology/approachThe microstructure, mechanical properties and intergranular corrosion properties of AISI 409 M FSS using shielded metal arc welding were investigated. Shielded metal arc welding with different welding current values are used to change the heat input in the joints resulted in the microstructural variations. The microstructure of the welded steel was carefully inspected along the width of the heat-affected zone (HAZ) and the transverse-section of the thin plate.FindingsThe width of heat affected zone (3.1,4.2 and 5.8 mm) increases on increasing the welding heat input. Due to change in grain size (grain coarsening) as HAZ increased. From the microstructure, it was observed that the large grain growth which is dendritic and the structure become finer to increase in welding heat input. For lower heat input, the maximum microhardness value (388HV) was observed compared with medium (351 HV) and higher heat input (344 HV), which is caused by a rapid cooling rate and the depleted area of chromium (Cr) and nickel (Ni). The increase in weld heat input decreases tensile strength, i.e. 465 MPa, 440 MPa and 418 MPa for low, medium and high heat input, respectively. This is because of grain coarsening and chromium carbide precipitation in sensitized zone and wider HAZ. The degree of sensitization increases (27.04%, 31.86% and 36.08%) to increase welding heat input because of chromium carbide deposition at the grain boundaries. The results revealed that the higher degree of sensitization and the difference in intergranular corrosion behavior under high heat input are related to the grain growth in the HAZ and the weld zone.Originality/valueThe study is based on intergranular corrosion behavior of welded SS 409 M in H2SO4 solution (0.5 M) with the addition of NH4SCN (0.01 M) with different heat input which is rarely found in literature.
Sachin Ambade, Chetan Tembhurkar, Awanikumar Patil, and Diwesh Babruwan Meshram
Emerald
Purpose This paper aims to study the effect of number of welding passes on microstructure, mechanical and corrosion properties of 409 M ferritic stainless steel. Shielded metal arc welding (SMAW) process is used to weld two metal sheets of 409 M having 3 mm thickness as bead-on-plate with single, double and triple passes. Microstructures were observed at transverse section with the help of optical microscope and with increasing number of passes grain growth, and the width of heat-affected zone (HAZ) increases. The results of tensile tests revealed that as number of passes increases, there is reduction in tensile strength and ductility. Double loop electrochemical potentiokinetic reactivation (DL-EPR) test revealed that as number of passes increases, the degree of sensitization increases. This is due to the deposition of chromium carbides at the grain boundaries and the associated depletion of chromium. Design/methodology/approach Three welded plates of single, double and triple pass were welded by SMAW process. From three welded plates (single, double and triple passes), samples for microstructural examination were cut in transverse direction (perpendicular to welding direction) with the help of wire-cut electrical discharge machine (EDM). The welded plates were sliced using wire-cut EDM along transverse direction for preparing optical microscopy, tensile testing, microhardness and DL-EPR testing specimens. Findings From the microstructure, it was observed that the large grain growth, which is dendritic, and the structure become finer to increase in number of welding passes. As number of passes increases, the width of HAZ increases because of the higher temperature at the welded zone. The tensile strength decreases to increase the number of welding passes because of grain coarsening and chromium carbide precipitation in sensitized zone and wider HAZ. The maximum microhardness value was observed for single-pass weld as compared to double- and triple-pass welds because of the fast cooling rate. The degree of sensitization increases to increase the number of passes because of chromium carbide deposition at the grain boundaries. Originality/value The authors declare that the manuscript is original and not published elsewhere, and there is no conflict of interest to publish this manuscript.
Chetan Tembhurkar, Ravinder Kataria, Sachin P. Ambade, and Jagesvar Verma
Springer International Publishing
Sachin Ambade, Ravinder Kataria, Chetan Tembhurkar, and Diwesh Meshram
Informa UK Limited
Sachin Ambade, Awanikumar P. Patil, Chetan K. Tembhurkar, and Diwesh B. Meshram
Informa UK Limited
Chetan Tembhurkar, Ravinder Kataria, Sachin Ambade, Jagesvar Verma, Anand Sharma, and Saurabh Sarkar
Springer Science and Business Media LLC
Chetan Tembhurkar, Sachin Ambade, Ravinder Kataria, and Aditya Tikle
Elsevier BV
S. N. Waghmare, Sagar D. Shelare, C. K. Tembhurkar, and S. B. Jawalekar
Springer Singapore
S. N. Waghmare, S. D. Shelare, C. K. Tembhurkar, and S. B. Jawalekar
Springer Singapore
Chetan Tembhurkar, Ravinder Kataria, Sachin Ambade, and Jagesvar Verma
Springer Singapore
Subhash N. Waghmare, Chandrashekhar N. Sakhale, Chetan K. Tembhurkar, and Sagar D. Shelare
Springer Singapore
Sanjay Mowade, Subhash Waghmare, Sagar Shelare, and Chetan Tembhurkar
Springer Singapore
, Dr.Subhash Waghmare, Dr. Nischal Mungle, , Chetan Tembhurkar, , Sagar Shelare, , Nilesh Pathare, and
Blue Eyes Intelligence Engineering and Sciences Engineering and Sciences Publication - BEIESP
The importance of manhole in the sewerage system is to get the underground pipelines and alternative systems area unit in good shape. A manhole cover is a detachable plate setting the roof above the manhole opening, to prevent anything from dropping in, and to stay away from unauthorized persons and matter to fall in it. Manhole covers are usually manufactured of cast iron, concrete or combine both. This creates them economical, powerful, and dense, generally weighing more than 50 kg. The weight supports to maintain them in position when transportation moves across them and makes it complicated for an unauthorized person not having proper tools to remove them. The traditional method of removing the manhole with the assistance of the hook. So, to safely remove the manhole cover, many innovative and automated techniques are designed and used for analysis. In this paper, the finite element analysis of a power screw operated manhole cover is analyzed with the help of ANSYS R14.5.
Chetan K. Tembhurkar and Prashant D. Kamble
IEEE
There is a demand for safer, cleaner and more affordable civil air engines and found to be of greater importance. Few years before, the European Union took a action for the design and construction of efficient and environmental friendly air engines. The benefits of this type of engine are focused on to reduced pollutants and decreased fuel consumption. In a wheeled vehicle engine system comprising a compressed air powered engine and tank assemblies, an engine connects to the vehicle drive wheels and is powered by compressed air and operates without emitting air pollutants and the tank assembly comprises a replaceable and/or rechargeable main air tank assembly containing air at high pressure and recovery tanks both so connected to the engine and arranged such that to recover and store energy of the vehicle and engine developed during braking and high speed engine operation which was not fully utilize to propel the vehicle. This paper is very helpful for finding the difference between the design of air engine with design of SI and CI engine. This paper is also very useful for developing and design of piston for further analysis.