1. a Department of Mechanical Engineering, Sir CR Reddy College of Engineering, Eluru — 534 007, India;, Email: madhusudan_sunanda@rediffmail.com
2. b Department of Mechanical Engineering, AU College of Engineering, Visakhapatnam — 530 003, India
3. c Department of Metallurgical Engineering, AU College of Engineering, Visakhapatnam — 530 003, India