材料期刊网

CREEP OF POLYCRYSTALLINE NEAR γ-TiAl WITH A LAMELLAR MICROSTRUCTURE

WR. Chen , J.Triantafillou , J. Beddoes and L. Zhao(Dept. of Mech. & Aero. Eng. , Carleton University , Ottawa , Canada Structures , Materials & Propulsion Laboratory , National Research Council , Ottawa , Canada Manuscript received 26 August 1996)

金属学报(英文版)

Creep of a polycrystalline near γ-TiAl alloy in two fully lamellar conditions is presented. A lamellar structure with fine interface spacing and planar grain boundaries provides improved creep resistance. The lamellar structure with wide interface spacing and interlocked grain boundaries has <1/2 the creep life, five times the minimum strain rate and greater tertiary strain.Creep strain is accommodated by dislocation motion in soft grains, but the strain rate is controlled by hard grains. The resistance to fracture is controlled by the grain boundary morphology, with planar boundaries causing intergranular fracture.To maximize the creep resistance of near γ-TiAl with a lamellar microstructure requires narrow lamellar interface spacing and interlocked lamellae along grain boundaries.

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University of Science and Technology Beijing

JIA Shizhen University of Science and Technology Beijing , China.

材料科学技术（英文）

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Department of Metallurgy and Materials Engineering of Chongqing University

YAN Guangting Chongqing University , Sichuan , China.

材料科学技术（英文）

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Institute of Materials Science at Jilin University——A Brief Overview

WANG Yuming Institute of Materials Science , Jilin University , Changchun , 130023 , China

材料科学技术（英文）

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Abstracts of papers from Journal of University of Science and Technology Beijing

稀有金属（英文版）

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RF deflecting cavity design for bunch length measurement of photoinjector at Tsinghua University

中国物理C

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Design of an MeV ultra-fast electron diffraction experiment at Tsinghua university

中国物理C

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Huazhong University of Science and Technology(H.U.S.T)

材料科学技术（英文）

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Drive laser system for the DC-SRF photoinjector at Peking University

中国物理C doi:10.1088/1674-1137/40/1/017004

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Opening Ceremony of Sichuan Rare-Earth Research Center & Ruisi Rare-Earth Company Holding in Sichuan University

稀土学报(英文版)

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