Influence of Yb on the Phase Composition and Mechanical Properties of Low-Scandium Al-Mg-Mn-Zr-Sc and Al-Mg-Cr-Zr-Sc Alloys

被引：11
作者：
Pozdnyakov, A. V. [1 ]
Barkov, R. Yu. [1 ]
Levchenko, V. S. [1 ]
机构：
[1] Natl Univ Sci & Technol MISiS, Moscow 119049, Russia
来源：
PHYSICS OF METALS AND METALLOGRAPHY | 2020年 / 121卷 / 01期
基金：
俄罗斯科学基金会;
关键词：
aluminum alloys; ytterbium; microstructure; mechanical properties; AL-4.7MG-0.32MN-0.21SC-0.09ZR ALLOY; PRECIPITATION EVOLUTION; ER; MICROSTRUCTURE; ADDITIONS; BEHAVIOR; RECRYSTALLIZATION; NUCLEATION; RESISTANCE; CORROSION;
D O I：
10.1134/S0031918X20010111
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The microstructure, phase composition, and mechanical properties of new low-scandium Al-6.0Mg-0.2Mn-0.05Sc-0.25Zr-0.3Yb and Al-6.0Mg-0.2Cr-0.05Sc-0.25Zr-0.3Yb alloys have been studied. Ytterbium leads to the formation of a quaternary phase (Al, Mg, Yb, Si) of crystallization origin in the Al-6.0Mg-0.2Mn-0.05Sc-0.25Zr-0.3Yb alloy. Phases have been detected in the Al-6.0Mg-0.2Cr-0.05Sc-0.25Zr-0.3Yb ingot, (Al, Fe, Si), (Al, Mg, Yb, Si), and (Al, Fe, Yb). The greatest strengthening has been achieved in ingots after annealing at 440 degrees C for 10 hours owing to the precipitation of Al-3(Sc, Zr, Yb) dispersed inclusions (L1(2) phase). The optimal combination of strength characteristics and plasticity have been reached in the rolled sheet made of Al-6.0Mg-0.2Cr-0.05Sc-0.25Zr-0.3Yb alloy by annealing at 200 degrees C for 1 hour: yield stress of 356 MPa, ultimate tensile strength of 443 MPa, and elongation of 10.5%.
引用
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页码：84 / 88
页数：5
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