Feature Selection for Identification of Spot Welding Processes

2008 ◽  
pp. 69-79 ◽  
Author(s):  
Eija Haapalainen ◽  
Perttu Laurinen ◽  
Heli Junno ◽  
Lauri Tuovinen ◽  
Juha Röning
Keyword(s):  
Feature Selection ◽  
Spot Welding ◽  
Selection For ◽  
Welding Processes

Microstructure of resistance spot welding of maraging steels

1990 ◽  
Vol 48 (4) ◽  
pp. 900-901
Author(s):  
I. Neuman ◽  
S.F. Dirnfeld ◽  
I. Minkoff
Keyword(s):  
Maraging Steel ◽  
Spot Welding ◽  
Lath Martensite ◽  
Base Material ◽  
Aging Treatment ◽  
High Strength ◽  
Maraging Steels ◽  
Heat Treated ◽  
Current Cycle ◽  
Welding Processes

Experimental work on the spot welding of Maraging Steels revealed a surprisingly low level of strength - both in the as welded and in aged conditions. This appeared unusual since in the welding of these materials by other welding processes (TIG,MIG) the strength level is almost that of the base material. The maraging steel C250 investigated had the composition: 18wt%Ni, 8wt%Co, 5wt%Mo and additions of Al and Ti. It has a nominal tensile strength of 250 KSI. The heat treated structure of maraging steel is lath martensite the final high strength is reached by aging treatment at 485°C for 3-4 hours. During the aging process precipitation takes place of Ni3Mo and Ni3Ti and an ordered solid solution containing Co is formed.Three types of spot welding cycles were investigated: multi-pulse current cycle, bi-pulse cycle and single pulsle cycle. TIG welded samples were also tested for comparison.The microstructure investigations were carried out by SEM and EDS as well as by fractography. For multicycle spot welded maraging C250 (without aging), the dendrites start from the fusion line towards the nugget centre with an epitaxial growth region of various widths, as seen in Figure 1.

Chicken Algorithm Based Feature Selection For Arabic Information Searching System

2019 ◽  
pp. 389
Author(s):  
زينب عبدالأمير ◽  
علياء كريم عبدالحسن
Keyword(s):  
Feature Selection ◽  
Information Searching ◽  
Selection For

scholarly journals Fault Feature Selection for Distribution Network

2021 ◽  
Vol 1881 (2) ◽  
pp. 022080
Author(s):  
Zhiqiang Wu ◽  
Lizong Zhang ◽  
Gang Yu ◽  
Ying Wang ◽  
Tao Huang ◽  
...  
Keyword(s):  
Feature Selection ◽  
Distribution Network ◽  
Selection For

Feature Selection for Classification using Principal Component Analysis and Information Gain

2021 ◽  
Vol 174 ◽  
pp. 114765 ◽  
Author(s):  
Erick Odhiambo Omuya ◽  
George Onyango Okeyo ◽  
Michael Waema Kimwele
Keyword(s):  
Principal Component Analysis ◽  
Feature Selection ◽  
Information Gain ◽  
Principal Component ◽  
Component Analysis ◽  
Selection For
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