Fracture Mechanical Testing of In Service Thermally Aged Cast Stainless Steel

2017 ◽  
pp. 58-80
Author(s):  
Martin Bjurman ◽  
Björn Forssgren ◽  
Pål Efsing
Keyword(s):  
Stainless Steel ◽  
Mechanical Testing ◽  
Cast Stainless Steel

FEM Simulation of Waves Excited by Array Probe Propagating in Centrifugally Cast Stainless Steel With Hexagonal Column

2021 ◽  
Author(s):  
Shan Lin ◽  
Yasushi Ikegami
Keyword(s):  
Stainless Steel ◽  
Fem Simulation ◽  
Transversely Isotropic ◽  
Primary Coolant ◽  
Centrifugally Cast ◽  
Anisotropic Property ◽  
Array Probe ◽  
Columnar Grains ◽  
Promising Solution ◽  
Cast Stainless Steel

Abstract Centrifugally cast stainless steel (CCSS) is widely used in PWR primary coolant systems. However, ultrasonic testing for such material is very challenging because its coarse grains and anisotropic property. The phased array ultrasonic technology (PAUT) is considered the most promising solution to the problem mentioned. To improve the accuracy of PAUT for CCSS with columnar grains, we used the voxel-based finite element method to perform simulation of wave propagation in CCSS, where waves were excited by a linear array. We modeled columnar grains in CCSS with hexagonal columns and introduced a side-drilled hole. It was easily to have different inclined columnar grains by rotating the crystal axes. All column crystals were considered cubic crystals while CCSS with columnar grains was macroscopically transversely isotropic. Wave propagations were computed for different focal laws and their results were compared. Waves exactly propagated toward and focused at the targeted SDH when focal laws were calculated according to the anisotropic property of CCSS, but deviated the target for focal laws based on isotropy.

377. Corrosion by commercial sodium hypochlorites and its inhibition

1949 ◽  
Vol 16 (1) ◽  
pp. 23-38 ◽  
Author(s):  
G. H. Botham ◽  
G. A. Dummett
Keyword(s):  
Stainless Steel ◽  
Sodium Silicate ◽  
Sodium Hypochlorite ◽  
Storage Conditions ◽  
Simple Equation ◽  
Nickel Silver ◽  
Copper Nickel ◽  
Dairy Equipment ◽  
Cast Stainless Steel ◽  
Bactericidal Efficiency

Commercial sodium hypochlorites, whether containing KMnO4 or not, are shown to be corrosive at 150 p.p.m. available chlorine and 40° C. to metals such as aluminium, tinned copper, nickel silver and cast stainless steel (18 Cr, 8 Cu, 3 Mo) which are used in dairy equipment. Hypochlorites containing KMnO4 when aged are potentially dangerous to wrought 18/8 stainless steel. The attack is by pitting and therefore especially dangerous to all the metals investigated, and, in general, increases with increase of time of exposure and temperature.Decay of sodium hypochlorite solutions results in conversion of NaOCl to NaCl and NaC103, which reaction is shown to follow a simple equation fairly closely in various storage conditions.Attack on metals by sodium hypochlorite can be efficiently inhibited by addition of sodium silicate, which has a specific action in addition to the effect exerted by increase of alkalinity. NaOH and Na2CO3 additions to the same pH are not so effective and increase attack on aluminium.Increase of pH from 9 to 10·5 by addition of Na2CO3 or sodium silicate reduces bactericidal efficiency of hypochlorites to the same extent.

Fracture Toughness of Z3CN20.09M Cast Stainless Steel with Long-Term Thermal Aging

2017 ◽  
Vol 26 (9) ◽  
pp. 4442-4449 ◽  
Author(s):  
Weiwei Yu ◽  
Dunji Yu ◽  
Hongbo Gao ◽  
Fei Xue ◽  
Xu Chen
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Thermal Aging ◽  
Cast Stainless Steel

scholarly journals Effect of the QLT Treatment on the Toughness of 13%Cr Cast Stainless Steel

1982 ◽  
Vol 46 (4) ◽  
pp. 433-440 ◽  
Author(s):  
Toshiro Kobayashi ◽  
Hiroshi Tachibana ◽  
Wataru Yagi ◽  
Yoshisada Ueda
Keyword(s):  
Stainless Steel ◽  
Cast Stainless Steel

scholarly journals Quality Improvement of Continuously Cast Stainless Steel Blooms through Electromagnetic Stirring

1977 ◽  
Vol 63 (8) ◽  
pp. 1287-1296 ◽  
Author(s):  
Hidemaro TAKEUCHI ◽  
Yasunobu IKEHARA ◽  
Takashi YANAI ◽  
Shogo MATSUMURA
Keyword(s):  
Stainless Steel ◽  
Quality Improvement ◽  
Electromagnetic Stirring ◽  
Continuously Cast ◽  
Cast Stainless Steel
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