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

共 37 条

[1]

[Anonymous], MACHINING METALS

[2]

[Anonymous], 1969, METALL REV

[3] A finite element model of high speed metal cutting with adiabatic shearing [J].

Bäker, M ;

Rösler, J ;

Siemers, C .

COMPUTERS & STRUCTURES, 2002, 80 (5-6) :495-513

[4] MEASUREMENTS OF SELF-DIFFUSION RATES ALONG DISLOCATIONS IN FCC METALS [J].

BALLUFFI, RW .

PHYSICA STATUS SOLIDI, 1970, 42 (01) :11-&

[5] CORRELATIONS FOR DIFFUSION CONSTANTS [J].

BROWN, AM ;

ASHBY, MF .

ACTA METALLURGICA, 1980, 28 (08) :1085-1101

[6] On repeated adiabatic shear band formation during high-speed machining [J].

Burns, TJ ;

Davies, MA .

INTERNATIONAL JOURNAL OF PLASTICITY, 2002, 18 (04) :487-506

[7] A TEM STUDY OF MICROSTRUCTURAL CHANGES DURING RETROGRESSION AND REAGING IN 7075 ALUMINUM [J].

DANH, NC ;

RAJAN, K ;

WALLACE, W .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1983, 14 (09) :1843-1850

[8] Calibrated thermal microscopy of the tool-chip interface in machining [J].

Davies, MA ;

Yoon, H ;

Schmitz, TL ;

Burns, TJ ;

Kennedy, MD .

MACHINING SCIENCE AND TECHNOLOGY, 2003, 7 (02) :167-190

[9] Thermomechanical oscillations in material flow during high-speed machining [J].

Davies, MA ;

Burns, TJ .

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2001, 359 (1781) :821-846

[10]

DESHAYS L, 2004, P 2004 ASME INT MECH

← 1 2 3 4 →