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Mannan, S. L.
- Strain Controlled Low Cycle Fatigue Behaviour of Type 304 SS Base, Type 308 SS Weld and 304/308 SS Weldments
Abstract Views :288 |
PDF Views:4
Authors
Affiliations
1 Indira Gandhi Centre for Atomic Research, Kalpakkam, IN
1 Indira Gandhi Centre for Atomic Research, Kalpakkam, IN
Source
Indian Welding Journal, Vol 22, No 3 (1990), Pagination: 93-105Abstract
The emergence of liquid metal fast breeder reactor (LMFBR) technology made it necessary to use austenitic stainless steels at elevated temperatures where the mechanical properties are significantly influenced by time and cycle dependent phenomenon such as creep and low cycle fatigue (LCF).
- Weldability of Austenitic Stainless Steels
Abstract Views :262 |
PDF Views:4
Authors
S. L. Mannan
1,
V. Shankar
1
Affiliations
1 Materials Development Group, IGCAR, Kalpakkam-603 102, IN
1 Materials Development Group, IGCAR, Kalpakkam-603 102, IN
Source
Indian Welding Journal, Vol 32, No 4 (1999), Pagination: 7-17Abstract
Hot cracking is an important problem encountered during the welding of austenitic stainless steels. It is known that hot cracking occurs by the formation of low melting eutectic phases in the solidifying weld metal and in the heat-affected zone(HAZ), under the action of shrinkage stresses and restraint imposed on the joint (ref. 1-3). In the HAZ, cracking occurs by liquation of grain boundaries in the partially melted zone adjacent to the fusion line and in previously deposited weld metal in a multipass weld (ref.4).- Fatigue of Welded Components and Structures-Current Status
Abstract Views :214 |
PDF Views:5
Authors
Affiliations
1 Indira Gandhi Centre for Atomic Research, KALPAKKAM, IN
1 Indira Gandhi Centre for Atomic Research, KALPAKKAM, IN
Source
Indian Welding Journal, Vol 28, No 1&2 (1995), Pagination: 49-52Abstract
Structural components such as in bridges, cranes, engines, pressure vessels and offshore structures are often subjected to cyclic loading Fatigue failures generally occur at stress concentration sites in the components The geometrical and metallurgical states of welds make them prone to fatigue failures owing to stress concentrations caused by weld shape and discontinuities. Moreover, welding introduces unfavourable tensile residual stresses, often of yield magnitude, which increases the severity of the applied fatigue loading. As a result, both applied compressive and tensile stresses can be equally damaging. In addition, the existence of defects in weld eliminates the fatigue crack initiation stage, and hence, the life IS predominantly governed by fatigue crack propagation.- Estimation of Weld Metal Hardness of Cr-Mo Steels
Abstract Views :323 |
PDF Views:6
Authors
Affiliations
1 Indira Gandhi Centre for Atomic Research, Kalpakkam, IN
2 Indian Institute of Technology, Powai, Mumbai, IN
1 Indira Gandhi Centre for Atomic Research, Kalpakkam, IN
2 Indian Institute of Technology, Powai, Mumbai, IN
Source
Indian Welding Journal, Vol 29, No 1 (1996), Pagination: 19-25Abstract
Hardness variation in the Cr-Mo steel weld metal as a function of Cr content and weld cooling rate was studied Chromium in the weld metal was varied by adding known amount of high purity Cr into the weld pool produced by a stationary arc. The cooling rate of the weld was measured by plunging W-Rh thermocouple in to the weld pool just at the time of extinguishing the arc and measuring the variation in temperature as a function of time using a X-t recorder. The microstructural studies revealed that in the low Cr steels the structure varied from fully martensitic to a mixture of bainite and martensite as the weld cooling rate decreased while for weld metal with Cr content higher than 5 wt% the structure remained fully martensitic irrespective of the cooling rate. The measured hardness of the weld metal for different Cr contents and cooling rates was compared with that predicted by Yurioka's and Hart's formulae. It was found that Yurioka’s formula can be used to predict the hardness of the weld metal with reasonable accuracy. It was further noticed that there is a reduction in the maximum hardness at Cr content above 5wt% and it is attributed to the presence of delta ferrite in the weld metal.- Creep Deformation and Rupture of 9Cr-1Mo and 2.25 Cr-1 Mo Weld Joints
Abstract Views :297 |
PDF Views:5
Authors
Affiliations
1 Materials Development Division Indira Gandhi Centre for Atomic Research Kalpakkam - 603102, IN
1 Materials Development Division Indira Gandhi Centre for Atomic Research Kalpakkam - 603102, IN