RAPID SOLIDIFICATION OF AL-CR-ZR-MN ALLOYS

被引：11

作者：

ADKINS, NJE ^{[1
]}

TSAKIROPOULOS, P ^{[1
]}

机构：

[1] UNIV SURREY,DEPT MAT SCI & ENGN,GUILDFORD GU2 5XH,SURREY,ENGLAND

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1991年 / 134卷

关键词：

D O I：

10.1016/0921-5093(91)90945-J

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The suppression of the Al11Cr2 and Al13Cr2 intermetallics in A15.1Cr-1.4Zr-1.5Mn (alloy A) and Al-3.3Cr-0.7Zr-0.7Mn (alloy B) has been studied by chill casting in cylindrical and wedge-shaped moulds. In alloy A the former phase is suppressed at approximately 500 K s-1 and the latter at approximately 10(4) K s-1. In alloy B the alpha-Al cellular structure free of the Al13Cr2 intermetallics is formed at cooling rates of 5 x 10(2) K s-1 to 2 x 10(3) K s-1 and shows an age hardening response reaching the peak hardness of 1500 MPa after 25 h at 400-degrees-C. The solid solution strengthening contribution of chromium, zirconium and manganese in alloy B is 536 MPa and the precipitate contribution of the metastable Ll2 Al3Zr phase at the peak aged condition is 571 MPa.

引用

页码：1158 / 1161

页数：4

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