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Basavarajappa, S.
- Evaluation of Mechanical Properties of Modified 9Cr-1Mo Welds Produced by Narrow Gap Hot Wire and Cold Wire Gas Tungsten Arc Welding Processes for 500MWe PFBR Steam Generators
Abstract Views :387 |
PDF Views:5
Authors
Aravinda Pai
1,
Shaju K. Albert
2,
Prabhat Kumar
1,
T. K. Mitra
1,
Irappa Sogalad
3,
S. Basavarajappa
3
Affiliations
1 Bharatiya Nabhikiya Vidyut Nigam Limited (BHAVINI), Department of Atomic Energy, Kalpakkam, Tamilnadu, IN
2 Indira Gandhi Centre for Atomic Research (IGCAR), Department of Atomic Energy, Kalpakkam, Tamilnadu, IN
3 Department of Studies in Mechanical Engineering, U.B.D.T. College of Engineering, Davanagere, Karnataka, IN
1 Bharatiya Nabhikiya Vidyut Nigam Limited (BHAVINI), Department of Atomic Energy, Kalpakkam, Tamilnadu, IN
2 Indira Gandhi Centre for Atomic Research (IGCAR), Department of Atomic Energy, Kalpakkam, Tamilnadu, IN
3 Department of Studies in Mechanical Engineering, U.B.D.T. College of Engineering, Davanagere, Karnataka, IN
Source
Indian Welding Journal, Vol 47, No 3 (2014), Pagination: 1-9Abstract
Modified 9Cr-1Mo material is selected as principal material of construction of Steam Generators (SG) for India's first of its kind 500MWe Prototype Fast Breeder Reactor (PFBR). The fabrication of PFBR Steam Generators involves welding of 12mm, 30mm and 90mm thick modified 9Cr-1Mo components which were carried out by combination of hot wire and cold wire Gas Tungsten Arc Welding processes. Hot wire Gas Tungsten Arc Welding (GTAW) is a relatively new process and limited machines/facilities are available in India for welding with this technique. The most important benefit from the use of a hot wire GTAW system is high weld deposition rate and reduced dilution & porosities from the weld deposits. Eventhough welds were meeting the specification requirements during welding procedure qualification, limited information available on hot wire GTAW process in open literature motivated authors for characterization of welds produced by this specialized technique. During welding procedure qualification, it was found that impact test results of weld metal produced by cold wire GTAW process is superior than weld metal produced by hot wire GTAW process. In light of this, detailed investigation & micro-structural analysis is carried out to find out the ischolar_main cause for variation in impact properties. This paper details the systematic evaluation and interesting observations during characterization of microstructure & mechanical properties of modified 9Cr-1Mo welds produced by hot wire and cold wire GTAW processes.Keywords
Modified 9Cr-1Mo, Hot Wire GTAW, Mechanical Properties, Cold Wire GTAW.
- A Stochastic Model for Inventory Cost Calculation with Fuzzy Demand
Abstract Views :193 |
PDF Views:0
Authors
Affiliations
1 Dept. of Industrial Engg. & Management, Siddaganga Institute of Technology, Tumkur, IN
2 Dept. of Studies in Mechanical Engg., University BDT College of Engg., Davangere, IN
3 VIT University, Vellore, IN
1 Dept. of Industrial Engg. & Management, Siddaganga Institute of Technology, Tumkur, IN
2 Dept. of Studies in Mechanical Engg., University BDT College of Engg., Davangere, IN
3 VIT University, Vellore, IN
Source
Manufacturing Technology Today, Vol 10, No 10 (2011), Pagination: 23-30Abstract
In the traditional inventory systems, demand and lead time data are assumed to be available and follow some probability distribution mostly normal. But in reality supply chain is dynamic in nature and associated with lots of uncertainties. In this paper an attempt is made to model (Q,r) (optimum order quantity, reorder point) policy in uncertain supply chain environment. Imprecise demand is modeled using fuzzy set theory and an iterative procedure is developed to calculate optimum order quantity, reorder point and total cost of maintaining inventory. The iterative procedure is demonstrated using a numerical example and obtained numerical results are compared with their crisp counterpart.Keywords
Continuous Review, (Q,R) Policy, Fuzzy Demand, Triangular Fuzzy Number, Extension Principle.- Investigation on the Effect of Graphite Reinforcement on Drilling of AL/SiCp Metal Matrix Composite-A Statistical Approach
Abstract Views :152 |
PDF Views:0
Authors
Affiliations
1 Dept. of Studies in Mechanical Engg., University BDT College of Engg., Davangere, IN
2 Karpagam College of Engg., Coimbatore, IN
1 Dept. of Studies in Mechanical Engg., University BDT College of Engg., Davangere, IN
2 Karpagam College of Engg., Coimbatore, IN