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tiger808: ½ð±Ò+4, ºÜÏêϸ£¬Ð»Ð» 2012-04-28 14:27:22
Accession number:  12580620

Title:  Effects of Zr Modification and Heat Treatment on Microstructure and Properties of ZA27 Alloy

Authors:  Li Fangping1 ; Yu Wenbin1 ; Qin Bing1 ; Du Darning2  

Author affiliation:  1  Sch. of Mater. Sci. & Eng., South- western Univ., Chongqing, China

2  Sch. of Mech. & Mater. Eng., Jiujiang Univ., Jiujiang, China


Source title:  Special Casting & Nonferrous Alloys

Abbreviated source title:  Spec. Cast. Nonferr. Alloys (China)

Volume:  31

Issue:  5

Publication date:  2011

Pages:  476-9

Language:  Chinese

ISSN:  1001-2249

CODEN:  TZJHEE

Document type:  Journal article (JA)

Publisher:  Editorial Board of Special Casting & Nonferrous Alloys

Country of publication:  China

Material Identity Number:  FY23-2011-007

Abstract:  ZA27 alloy ingot containing 0. 2% or 0. 5% Zr was prepared, and the prepared alloy was treated by solid solution at 370 ¡ãC for 12 hours and artificial aging at 100¡ãC. The results show that 0. 2% Zr can apparently modify the ZA27 alloy by transforming developed dendrite into fine rosette grain, however, 0. 5% Zr content can fade the modification effects as a result of generation of coarse rod-like Al3Zr phase. After solid solution treatment, supersaturated primary ¦Á', phase is transformed into fine (¦Á + ¦Ç) phase in the alloy, meanwhile, a little CuZns phase is found in ¦Á grain boundary, ¦Á grain in the alloy with 0. 2% Zr addition exhibits more uniformity and fine. In addition, Zr modification can significantly improve the peak hardness of the aged alloy, and postpone the corresponding aging time at 100 'C.

Number of references:  18

Inspec controlled terms:  ageing  -  aluminium alloys  -  copper alloys  -  grain boundaries  -  hardness  -  heat treatment  -  ingots  -  solid solutions  -  zirconium alloys

Uncontrolled terms:  heat treatment  -  microstructure  -  ZA27 alloy ingot  -  solid solution  -  artificial aging  -  grain boundary  -  hardness  -  temperature 370 degC  -  time 12 h  -  temperature 100 degC

Inspec classification codes:  A8140N Fatigue, embrittlement, and fracture  -  A8140G Other heat and thermomechanical treatments  -  A6170N Grain and twin boundaries  -  A6220M Fatigue, brittleness, fracture, and cracks

Numerical data indexing:  temperature 6.4315E+02 K;time 4.32E+04 s;temperature 3.7315E+02 K

Chemical indexing:  Al/ss Cu/ss Zr/ss

Treatment:  Experimental (EXP)

Discipline:  Physics (A)

DOI:  10.3870/tzzz.2011.05.027

Database:  Inspec

IPC Code:  C22F1/00
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