A Proposed Mechanism for the Stress Corrosion Fracture of a Copper-Beryllium Alloy

2009 ◽  
pp. 145-145-20
Keyword(s):  
Stress Corrosion ◽  
Corrosion Fracture ◽  
Copper Beryllium

The Mechanism of Stress Corrosion Fracture of a Copper-Beryllium Alloy

CORROSION ◽  
1969 ◽  
Vol 25 (10) ◽  
pp. 405-415 ◽  
Author(s):  
W. D. SYLWESTROWICZ
Keyword(s):  
Plastic Deformation ◽  
Grain Boundaries ◽  
Stress Corrosion ◽  
Applied Stress ◽  
Corrosive Environment ◽  
Alloy Specimen ◽  
Corrosion Fracture ◽  
Main Effect ◽  
Crystallographic Planes ◽  
Copper Beryllium

Abstract The process of stress corrosion fracture was investigated in a copper-beryllium alloy specimen exposed to different ammonia environments. Two basically different stages occur in this process. First, reactions leading to the formation of a crack, then formation and propagation of the crack. In the first stage, dissolution is probably the main effect of the corrosive environment resulting in a preferential attack on grain boundaries or on crystallographic planes. The distribution of solutes determines the areas of preferential attack (grain boundaries or crystallographic planes) and it depends on the aging conditions of the specimens. Plastic deformation and applied stress are not important factors in this stage. In the second stage, during the formation and propagation of the crack, the amount of plastic deformation, the value of applied stress and distribution of solutes are important. The main effect of the corrosive environment, in this stage, consists in the decrease of the surface free energy by a sorption process. Based on these observations a mechanism of stress-corrosion fracture in a copper-beryllium alloy specimen is proposed.

Effect of Temperature on Stress-Corrosion Fracture

CORROSION ◽  
1967 ◽  
Vol 23 (8) ◽  
pp. 245-251 ◽  
Author(s):  
W. D. SYLWESTROWICZ
Keyword(s):  
Plastic Deformation ◽  
Temperature Dependence ◽  
Temperature Effect ◽  
Stress Corrosion ◽  
Critical Value ◽  
Effect Of Temperature ◽  
Corrosion Fracture ◽  
Ammonia Atmosphere ◽  
Distribution Of Dislocations ◽  
Copper Beryllium

Abstract Prestrained samples of copper-beryllium alloy (1.8 Be, 0.3 Co) were exposed to an ammonia atmosphere at −20, 30 and 90 C (−4, 86, 194 F). It was found that the effect of temperature is related to the amount of plastic deformation. Above a critical value of plastic prestrain, temperature effect reverses; a longer exposure is needed to fracture a sample at 90 than at 30 C. This temperature dependence is explained by considering the number and distribution of dislocations.

The correlation of microstructure and stress corrosion fracture of HY-130 steel weldments

1980 ◽  
Vol 11 (10) ◽  
pp. 1723-1730 ◽  
Author(s):  
C. Chen ◽  
A. W. Thompson ◽  
I. M. Bernstein
Keyword(s):  
Stress Corrosion ◽  
Corrosion Fracture

scholarly journals Peculiarities of stress corrosion fracture of sensitized and neutron irradiated chromium-nickel austenitic steel

2022 ◽  
Vol 2155 (1) ◽  
pp. 012011
Author(s):  
A V Yarovchuk ◽  
A S Dikov ◽  
K V Tsay
Keyword(s):  
Stress Corrosion ◽  
Austenitic Steel ◽  
Structural Features ◽  
Intergranular Cracking ◽  
Reinforcing Effect ◽  
Corrosion Fracture ◽  
Fracture Surfaces ◽  
Corrosive Solution ◽  
Sem Studies

Abstract The results of SEM studies of fracture surfaces for the 12Cr18Ni9 austenitic steel ruptured under a fixedtensile load in FeCl3 water solutionand in air are presented. The samples of austenized, sensitized at 650° and irradiated with neutrons (to 1020n/cm2) steel were examined. It was shown thatirradiation hardening and sensitizing annealing increased the susceptibility of steel to intergranular cracking in corrosive solution. Structural features of formation of the strain-induced α’-martensite and its reinforcing effect on fracture in various environments are discussed.

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