Investigations on deformation and fracture behavior of workpiece material during high speed machining of 7050-T7451 aluminum alloy

2016 ◽  
Vol 14 ◽  
pp. 43-54 ◽  
Author(s):  
Bing Wang ◽  
Zhanqiang Liu
Keyword(s):  
Aluminum Alloy ◽  
High Speed ◽  
Fracture Behavior ◽  
High Speed Machining ◽  
Workpiece Material ◽  
Deformation And Fracture

Explosively Driven Expansion and Fragmentation Behavior for Cylinders, Spheres and Rings of 304 Stainless Steel

2010 ◽  
Vol 638-642 ◽  
pp. 1035-1040 ◽  
Author(s):  
Tetsuyuki Hiroe ◽  
Kazuhito Fujiwara ◽  
Hidehiro Hata ◽  
Mitsuru Yamauchi ◽  
Kiyotaka Tsutsumi ◽  
...  
Keyword(s):  
Stainless Steel ◽  
High Speed ◽  
Fracture Behavior ◽  
Copper Wire ◽  
304 Stainless Steel ◽  
Fragmentation Model ◽  
Fragmentation Behavior ◽  
Deformation And Fracture ◽  
Test Parameters ◽  
Fine Copper

Explosive loading techniques are applied to expand tubular cylinders, spherical shells and rings of 304 stainless steel to fragmentation, and the effects of wall thicknesses, explosive driver diameters and the constant proportionality of the in-plane biaxial stretching rates are investigated on the deformation and fracture behavior of three basic structures experimentally and numerically. In the cylinder tests, the driver is a column of high explosive PETN, inserted coaxially into the bore of a cylinder and initiated by exploding a fine wire bundle at the column axis using a discharge current from a high-voltage capacitor bank. In case of the ring tests, ring specimens are placed onto a single cylinder filled with the PETN as a expansion driver, and for sphere tests, specimens filled with the PETN are also initiated by exploding a fine copper wire line with small length located at the central point. Two types of experiments are conducted for every specimen and test condition. The first type uses high speed cameras to observe the deformation and crack generation of expanding specimens showing the final maximum in-plane stretching rate of above , and the second uses soft capturing system recovering typically most fragments successfully. The fragments are measured and investigated using a fragmentation model. The effects of test parameters on the deformation and fracture behavior for three types of structures are discussed in need of modified fragmentation model for shell structural elements.

The quasi static deformation and fracture behavior of aluminum alloy 7150

2008 ◽  
Vol 29 (4) ◽  
pp. 742-751 ◽  
Author(s):  
T.S. Srivatsan ◽  
G. Guruprasad ◽  
Vijay K. Vasudevan
Keyword(s):  
Aluminum Alloy ◽  
Fracture Behavior ◽  
Static Deformation ◽  
Deformation And Fracture

The Influence of Processing on Microstructural Development, Tensile Response and Fracture Behavior of Aluminum Alloy 5083

2011 ◽  
Vol 410 ◽  
pp. 175-186 ◽  
Author(s):  
Troy D. Topping ◽  
Ying Li ◽  
Enrique J. Lavernia ◽  
K. Manigandan ◽  
T.S. Srivatsan
Keyword(s):  
Aluminum Alloy ◽  
Fracture Behavior ◽  
Tensile Deformation ◽  
Coarse Grained ◽  
Microstructural Development ◽  
Deformation Kinetics ◽  
Aluminum Alloy 5083 ◽  
Fine Grain ◽  
Deformation And Fracture ◽  
Specific Influence

In this paper, the specific influence of quasi-isostatic forging and rolling of cryomilled powder on microstructural development and resultant tensile deformation and fracture behavior of aluminum alloy 5083 is highlighted and comparison made with the coarse grained counterpart. The specific influence and contribution of strain hardening to enhancing strength of the ultra-fine grain microstructure of the aluminum alloy is presented and discussed. It is shown that the capability of the ultra fine grain microstructure to recover strength through the mechanism of work hardening is quite similar to the conventionally processed counterpart. The influence and role of intrinsic microstructural features in governing tensile deformation and fracture behavior is elaborated upon. The viable microscopic mechanisms governing final fracture behavior is discussed in light of the competing and mutually interactive influences of nature of loading, intrinsic microstructural effects, and deformation kinetics. Key Words: aluminum alloy 5083, processing, microstructure, tensile properties, fracture

Influences of End Surface Angle of Workpiece on Burr Formation in High Speed Machining

2009 ◽  
Vol 69-70 ◽  
pp. 384-388
Author(s):  
Qin Xi Shen ◽  
Gui Cheng Wang ◽  
Hai Jun Qu ◽  
Yun Ming Zhu
Keyword(s):  
Aluminum Alloy ◽  
Formation Process ◽  
High Speed ◽  
Shear Angle ◽  
Burr Formation ◽  
High Speed Machining ◽  
Formation Processes ◽  
Key Factors ◽  
2024 Aluminum Alloy ◽  
Surface Angle

The end surface angle of workpece is one of key factors that affect burr sizes and shapes. In this paper, the burr formation process of different end surface angle is simulated with elastic plastic nonlinear element method based on ABAQUS. The influence of end surface angle of workpiece on burr formation processes in high-speed machining 2024 Aluminum alloy is analyzed. The influence of end surface angle on burr sizes and shapes is studied based on equivalent shear strain and negative shear angle. The results have investigated the mechanisms of burr formation fundamentally, which is the basis of burr minimization.

scholarly journals Application of a GTN Damage Model Predicting the Fracture of 5052-O Aluminum Alloy High-Speed Electromagnetic Impaction

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 761 ◽  
Author(s):  
Fei Feng ◽  
Jianjun Li ◽  
Peng Yuan ◽  
Qixian Zhang ◽  
Pan Huang ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
High Speed ◽  
Fracture Behavior ◽  
Volume Fraction ◽  
Damage Model ◽  
Weight Ratio ◽  
Model Parameters ◽  
Highly Nonlinear ◽  
Gtn Damage Model ◽  
Increasing Demand

An increasing demand exists within the automotive industry to utilize aluminum alloy sheets because of their excellent strength-weight ratio and low emissions, which can improve fuel economy and reduce environmental pollution. High-speed automobile impactions are complicated and highly nonlinear deformation processes. Thus, in this paper, a Gurson-Tvergaard-Needleman (GTN) damage model is used to describe the damage behavior of high-speed electromagnetic impaction to predict the fracture behavior of 5052-O aluminum alloy under high-speed impaction. The parameters of the GTN damage model are obtained based on high-speed electromagnetic forming experiments via scanning electron microscopy. The high-speed electromagnetic impaction behavior process is analyzed according to the obtained GTN model parameters. The shape of the high-speed electromagnetic impaction in the numerical simulations agrees with the experimental results. The analysis of the plastic strain and void volume fraction distributions are analyzed during the process of high-speed impact, which indicates the validity of using the GTN damage model to describe or predict the fracture behavior of high-speed electromagnetic impaction.

Diffusion wear mechanism during high-speed machining of 7475-T7351 aluminum alloy with carbide end mills

Wear ◽  
2008 ◽  
Vol 265 (11-12) ◽  
pp. 1793-1800 ◽  
Author(s):  
V.D. Calatoru ◽  
M. Balazinski ◽  
J.R.R. Mayer ◽  
H. Paris ◽  
G. L’Espérance
Keyword(s):  
Aluminum Alloy ◽  
Wear Mechanism ◽  
High Speed ◽  
High Speed Machining ◽  
Diffusion Wear ◽  
End Mills
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