Equilibrium grain-boundary segregation and the effect of boron in B-doped Fe-30wt. % Ni austenitic alloy

Journal Article · Wed May 01 00:00:00 EDT 1991 · Acta Metallurgica; (United States)

OSTI ID:7088788

Shenhua, S; Tingdong, X; Zhexi, Y ^[1]; Zongsen, Y ^[2]

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1. Dept. of Materials, Wuhan Iron and Steel Univ., Wuhan, Hubei 430081 (CN)
2. Dept. of Materials Physics, Univ. of Science and Technology Beijing, Beijing 100083 (CN)

In this paper, the equilibrium segregation of boron at grain boundaries and the relation between grain boundary hardening and segregation in B-doped Fe-30wt%Ni austenitic alloy are studied with the methods of microhardness measurement and Particle Tracking Autoradiography (PTA). It was found that equilibrium segregation of boron at grain boundaries appeared in the alloy as annealed between 650 and 960{degrees}C and no segregation of boron appeared above 1050{degrees}C. It could be concluded that an excess grain boundary hardening by addition of boron to the alloy was caused by the grain boundary segregation of boron.

• OSTI ID: 7088788
• Journal Information: Acta Metallurgica; (United States), Vol. 39:5; ISSN 0001-6160
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BORON
SEGREGATION
IRON BASE ALLOYS
ANNEALING
GRAIN BOUNDARIES
NICKEL ALLOYS
ATOM TRANSPORT
AUTORADIOGRAPHY
BORON ADDITIONS
EQUILIBRIUM
MICROHARDNESS
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
ALLOYS
BORON ALLOYS
CRYSTAL STRUCTURE
ELEMENTS
HARDNESS
HEAT TREATMENTS
IRON ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NEUTRAL-PARTICLE TRANSPORT
RADIATION TRANSPORT
SEMIMETALS
TEMPERATURE RANGE
360104* - Metals & Alloys- Physical Properties
360102 - Metals & Alloys- Structure & Phase Studies