Fatigue Behavior of an Ultrafine-Grained Al-Mg-Si Alloy Processed by High-Pressure Torsion

被引：25

作者：

Murashkin, Maxim ^{[1
,2
]}

Sabirov, Ilchat ^{[3
]}

Prosvirnin, Dmitriy ^{[4
]}

Ovid'ko, Ilya ^{[5
]}

Terentiev, Vladimir ^{[4
]}

Valiev, Ruslan ^{[1
,2
]}

Dobatkin, Sergey ^{[4
]}

机构：

[1] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa 450000, Russia

[2] St Petersburg State Univ, Lab Mech Bulk Nanostruct Mat, St Petersburg 199034, Russia

[3] IMDEA Mat Inst, Madrid 28906, Spain

[4] Russian Acad Sci, Baikov Inst Met & Mat Sci, Moscow 119991, Russia

[5] St Petersburg State Polytech Univ, Res Lab Mech New Nanomat, St Petersburg 195251, Russia

来源：

METALS | 2015年 / 5卷 / 02期

关键词：

SEVERE PLASTIC-DEFORMATION; MECHANICAL-PROPERTIES; ALUMINUM-ALLOYS; HIGH-STRENGTH; SC ALLOYS; REFINEMENT; MICROSTRUCTURE; DUCTILITY; LIFE;

D O I：

10.3390/met5020578

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The paper presents the evaluation of the mechanical and fatigue properties of an ultrafine-grained (UFG) Al 6061 alloy processed by high-pressure torsion (HPT) at room temperature (RT). A comparison is made between the UFG state and the coarse-grained (CG) one subjected to the conventional aging treatment T6. It is shown that HPT processing leads to the formation of the UFG microstructure with an average grain size of 170 nm. It is found that yield strength (sigma(0.2)), ultimate tensile strength (sigma(UTS)) and the endurance limit (sigma(f)) in the UFG Al 6061 alloy are higher by a factor of 2.2, 1.8 and 2.0 compared to the CG counterpart subjected to the conventional aging treatment T6. Fatigue fracture surfaces are analyzed, and the fatigue behavior of the material in the high cycle and low cycle regimes is discussed.

引用

页码：578 / 590

页数：13

共 37 条

[1] On the cyclic deformation response of ultrafine-grained Al-Mg alloys at elevated temperatures [J].