Structure and precipitation hardening response in a cast and wrought Al-Cu-Sn alloy

被引：11

作者：

Akopyan, T. K. ^{[1
]}

Shurkin, P. K. ^{[1
]}

Letyagin, N. V. ^{[1
]}

Milovich, F. O. ^{[1
]}

Fortuna, A. S. ^{[1
]}

Koshmin, A. N. ^{[1
]}

机构：

[1] Natl Univ Sci & Technol MISiS, 4 Leninsky Pr, Moscow 119049, Russia

来源：

MATERIALS LETTERS | 2021年 / 300卷

基金：

俄罗斯科学基金会;

关键词：

Al alloys; Aging; Trace additions; Hardening;

D O I：

10.1016/j.matlet.2021.130090

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Experimental studies including microhardness and electrical conductivity measurements, transmission electron microscopy (TEM) together with atom probe tomography (APT) have been carried out for exploring the influence of tin (Sn) trace addition on the structure and precipitation hardening response in Al-Cu based alloy after either casting or cold or hot rolling. It is shown that the Sn trace addition refines the Al2Cu phase in an as-cast Al3.5Cu0.1Sn (wt.%) alloy. The alloy showed an increase by about 20% the peak hardness (similar to 120 HV) for both cast and wrought products as well as significant reduction in the aging time to peak hardness (from 12 h to 2 h at 175 degrees C). According to the TEM and APT, the increased hardness is due to the formation of much finer theta-phase precipitates with high number density.

引用

页数：4

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