Surface and grain boundary segregation in relation to intergranular fracture: boron and sulfur in Ni/sub 3/Al

Journal Article · Sat Dec 01 00:00:00 UTC 1984 · Scr. Metall.; (United States)

DOI:https://doi.org/10.1016/0036-9748(84)90377-6· OSTI ID:5090180

White, C L; Liu, C T; Padgett, R A; Yalisove, S M

Unlike most solutes that segregate to grain boundaries, we have observed that boron segregates more strongly to grain boundaries than to free surface in Ni/sub 3/Al. This observation, along with the previously reported beneficial effect of boron segregation on grain boundary strength, is in qualitative agreement with a theory of grain boundary cohesion first put forward by Rice. If similar studies of other beneficial grain boundary segregants bear out this initial agreement with Rice's theory, our understanding concerning the nature of segregation effects on grain boundary cohesion could be significantly enhanced.

• Research Organization: Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN
• DOE Contract Number: NONE
• OSTI ID: 5090180
• Journal Information: Scr. Metall.; (United States), Journal Name: Scr. Metall.; (United States) Vol. 18:12; 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
ALLOYS
ALUMINIUM ALLOYS
BORON
CRYSTAL STRUCTURE
ELEMENTS
GRAIN BOUNDARIES
MICROSTRUCTURE
NICKEL ALLOYS
NICKEL BASE ALLOYS
NONMETALS
SEGREGATION
SEMIMETALS
SULFUR
SURFACE PROPERTIES