Microstructural characterization of Al-7075-T651 chips and work pieces produced by high-speed machining

被引：69

作者：

Campbell, C. E. ^{[1
]}

Bendersky, L. A.

Boettinger, W. J.

Ivester, R.

机构：

[1] Natl Inst Stand & Technol, Div Met, Mat Sci & Engn Lab, Gaithersburg, MD 20899 USA

[2] Natl Inst Stand & Technol, Mfg Metrol Div, Mfg Engn Lab, Gaithersburg, MD 20899 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 430卷 / 1-2期

关键词：

high-speed machining; orthogonal cutting; Al-7075; alloy;

D O I：

10.1016/j.msea.2006.04.122

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

High-speed orthogonal machining produced a series of Al-7075-T651 chips and work pieces for microstructural charcterization. The orthogonal machining conditions included two rake angles, three cuttings speeds, and a constant feed rate. The chips and work pieces were characterized using optical metallography, transmission electron microscopy (TEM), and microhardness measurements. TEM observations indicated growth of the eta' precipitates and showed recrystallized equiaxed grains within the shear bands of the chips. Microhardness profiles of the work pieces showed a decrease in hardness at the work surface. The thickness of this deformation layer increased with cutting speed. Microstructural characterizations were correlated with calculated temperature-time profiles to investigate possible mechanisms for the observed microstructure changes. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：15 / 26

页数：12

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