Effect of an element addition on relaxation of elastic distortion based on particle-blocked grain boundary sliding

Journal Article · Sun Aug 15 00:00:00 EDT 1993 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(93)90166-P· OSTI ID:6311168

Monzen, Ryoichi; Futakuchi, Mitsunobu ^[1]; Miura, Hiromi ^[2]

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1. Kanazawa Univ., Kanazawa (Japan). Dept. of Mechanical Systems Engineering
2. Univ. of Electro-Communications, Tokyo (Japan). Dept. of Mechanical and Control Engineering

Internal friction studies indicate that grain boundaries slide under an applied shear stress at relatively low temperatures, e.g. about 500K for Cu. At these low temperatures where diffusivity is sufficiently low, boundary sliding is blocked by second-phase particles on a boundary and an internal stress is built up as the sliding proceeds. The sliding stops when the internal stress eventually balances the external stress in the particle-free area of the boundary. The internal stress also acts on the particles. At higher temperatures, diffusivity becomes large and diffusion can relax the internal stress in and around the particles. In the previous study, the authors examined the relaxation process of the elastic distortion, caused by the blocking of boundary sliding by b.c.c. Fe-Co particles on a grain boundary of Cu, by observing the rotation of moire fringes formed by the interference between the 111[sub t] and o11[sub b] reflections in electron microscopy (TEM). In this note, the effect of Bi addition on the relaxation process is examined using the moire fringe method. It is well known that Bi segregates to grain boundaries of Cu. Therefore, the addition of Bi may be expected to modify the interface structure between the matrix and particle and thus lead to a change in the diffusional relaxation rate along the interface. This is the motivation of the present study.

• OSTI ID: 6311168
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 29:4; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
BISMUTH
COBALT ADDITIONS
COBALT ALLOYS
COPPER ALLOYS
COPPER BASE ALLOYS
DATA
ELASTICITY
ELECTRON MICROSCOPY
ELEMENTS
EXPERIMENTAL DATA
FRICTION
GRAIN BOUNDARIES
INFORMATION
INTERNAL FRICTION
IRON ALLOYS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
MICROSCOPY
MICROSTRUCTURE
NUMERICAL DATA
RELAXATION
STRESS RELAXATION
TENSILE PROPERTIES
TRANSMISSION ELECTRON MICROSCOPY