PRECIPITATION EFFECTS DURING HOT DEFORMATION OF A COPPER ALLOY

被引：24
|
作者：
BLAZ, L [1 ]
EVANGELISTA, E [1 ]
NIEWCZAS, M [1 ]
机构：
[1] UNIV ANCONA,DEPT MECH,I-60131 ANCONA,ITALY
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1994年 / 25卷 / 02期
关键词：
D O I：
10.1007/BF02647971
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hot compression tests were performed on a previously solution-treated Cu-3Ni-1Si-O.8Cr-O.1Mg alloy below the solvus temperature. The effects of precipitation occurring during hot deformation and the accompanying flow stresses were analyzed on the basis of microstructural evolution using optical, scanning, and transmission electron microscopy, and microhardness measurements. It was found that the hardening stage was followed by strain-induced localized Ni2Si-precipitate coarsening at the temperature related to the most effective dynamic precipitation. Intensive coarsening of precipitates began at grain boundaries. Very fine Ni2Si precipitates were transformed into elongated particles at grain boundaries, producing flow localization, softening, and finally sample fracture.
引用
收藏
页码：257 / 266
页数：10
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