Intergranular vs. transgranular stress corrosion cracking of Cu 30-Au

Journal Article · Sun Mar 01 04:00:00 EST 1992 · Scripta Metallurgica; (United States)

DOI:https://doi.org/10.1016/0956-716X(92)90430-M· OSTI ID:5578743

Chen, J S; Devine, T M ^[1]; Salmeron, M ^[2]

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1. California Univ., Berkeley, CA (United States). Dept. of Materials Science and Mineral Engineering
2. Div. of Materials Sciences, Lawrence Berkeley Lab., Berkeley, CA (US)

The mechanism of transgranular stress corrosion cracking (TGSCC) that was proposed by Edeleanu and Forty and Sieradzki and Newman recognized an often neglected aspect of TGSCC, namely, the brittle, cleavage-like appearance of the fracture surface. In this paper it is suggested that anodic processes produce a surface layer that induces cleavage of the normally ductile substrate. Demonstrated in experiments by Newman et al. on thin foils of {alpha}-brass. Foils that were fractured at 77{degrees}K without prior corrosion failed in a ductile manner as did foils that were corroded, dried, and then fractured in air. Thus, brittle fracture did to occur merely as a result of immersion in the aqueous solution, nor did it occur simply as a result of deformation at low temperature. In fact, failure occurred by local fracture at the surface where the alloy reacted with the environment followed by brittle crack propagation through the normally ductile substrate.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5578743
• Journal Information: Scripta Metallurgica; (United States), Journal Name: Scripta Metallurgica; (United States) Vol. 26:5; ISSN 0036-9748; ISSN SCRMB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
AIR
ALLOYS
CHEMICAL REACTIONS
COPPER ALLOYS
CORROSION
CRACK PROPAGATION
DISSOLUTION
DUCTILE-BRITTLE TRANSITIONS
EMBRITTLEMENT
FLUIDS
FRACTURE MECHANICS
GASES
GOLD ALLOYS
INTERGRANULAR CORROSION
MECHANICS
PHASE TRANSFORMATIONS
STRESS CORROSION
SUBSTRATES