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
Maitra, N. K.
- Prospects of Petrochemical and Coal Based Industries in Eastern India
Authors
1 Sri Aurobindo Ashram, Pondicherry-605 002, IN
Source
Journal of the Association of Engineers, India, Vol 62, No 1-4 (1987), Pagination: 1-5Abstract
Petrochemicals are produced from petroleum products and to-date the Middle East Countries, which are mostly desert areas, have got the largest deposits of Crude Oil. So some jokingly term the petrochemicals as desert chemicals.
- Distortion in Welded Joints, its Causes and Remedies
Authors
1 M. N. Dastur & Company (P) Ltd., Calcutta, IN
Source
Journal of the Association of Engineers, India, Vol 60, No 1-4 (1985), Pagination: 12-16Abstract
This paper attempts to present causes of distortion in welded joints and its remedies so as to avoid rejection of welded products. It is well established today that fabrication by welding can achieve a lighter and cheaper form of construction than other methods of joining, but the welds in relation to the parts joined, in many cases, have considerable influence on the strength of the joint. A good welding means a sound joint free from harmful flaw and possessing the requisite ductility and strength.
In addition to the stresses due to the loads applied to the welded joints in operation stresses are also produced by expansion and contraction. These are liable to cause considerable distortion of the work. To avoid distortion a thorough knowledge on theory of distortion and its causes and remedies is required, which the author has tried to explain in this paper.
- Ultrasonic Testing:A State-of-The-Art
Authors
1 M. N. Dastur & Company (P) Ltd, IN
Source
Journal of the Association of Engineers, India, Vol 61, No 1-4 (1986), Pagination: 75-80Abstract
This paper attempts to present the basics of the ultrasonic testing of materials and the general way in which the testing equipment operates. In structural fabrication or in the manufacturing of machineries raw materials play a very important role. Internal defects in raw materials have considerable influence on the strength of the product.
A good product means free from harmful flaw and possessing the requisite strength to achieve desired performance.
Destructive tests give the properties of raw materials used which are mainly made on the samples prepared form the similar material as the same cannot be made on the main products which are to be delivered to a customer. For this reason use is often made of certain forms of Non-destructive testing, of which ultrasonic testing is one the important methods, which the author has tried to explain in his paper