Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 673, Issue -, Pages 1-7Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2016.07.017
Keywords
Cu-14Fe; Ag micro-alloying; Microstructure; Thermal stability; Ageing characteristics
Categories
Funding
- National Natural Science Foundation of China [51461018, 51561010]
- International Science and Technology Cooperation Project of Jiangxi Province [20151BDH80006]
- Prior Science and Technology Program Led by the Returned Overseas Chinese Talents [RSTH[2015]192- GRSZ [2015]273]
- Key Program of Natural Science Foundation of Jiangxi Province [20133BAB20008, 20144ACB20013]
- Science and Technology Innovation Project of Jiangxi Academy of Sciences [2013-YYB-1, 2013-XTPH1-19, 2015XTTD04]
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This paper studied the influence of Ag micro-alloying on the thermal stability and ageing characteristics of a deformation-processed Cu-14Fe in-situ composite prepared by thermo-mechanical processing. Heat treatment caused (i) edge recession, longitudinal splitting, cylinderization, break-up and spheroidisation of the Fe fibres in the Ag micro-alloyed Cu-14Fe in-situ composite, and (ii) recovery, recrystallisation and precipitation in the Cu matrix. Ag micro-alloying caused these processes to occur at lower temperatures. The index Z (a combination figure of merit that assesses the service performance) reached the peak value of 3.3 x 10(7) MPa2. % IACS after isothermal heat treatment at 500 degrees C for 1 h, where IACS is the International Annealed Copper Standard, a measure of conductivity. The optimum combinations of tensile strength and conductivity were 1033 MPa and 56.6% IACS; 931 MPa and 58.9% IACS; or 851 MPa and 60.6% IACS. The tensile strength and conductivity of Ag micro-alloyed Cu-14Fe in-situ composite at eta=7.8 after isochronal heat treatments were higher than those of the Cu-14Fe in-situ composite at each temperature. (C) 2016 Elsevier B.V. All rights reserved.
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