scholarly journals Surface work hardening of pure niobium induced by water polishing.

2000 ◽  
Vol 12 (1/2) ◽  
pp. 109-110
Author(s):  
Naotada HAGIWARA ◽  
Kazuya OGURI ◽  
Tsunenori SUZUKI ◽  
Haru-Hisa UCHIDA ◽  
Hiromasa YABE ◽  
...  
Keyword(s):  
Work Hardening ◽  
Pure Niobium ◽  
Surface Work

Surface work-hardening of back-up rolls

Metallurgist ◽  
1982 ◽  
Vol 26 (1) ◽  
pp. 32-33
Author(s):  
A. Yu. Firkovich ◽  
A. M. Tsun ◽  
A. I. Dobronravov ◽  
V. A. Brovkin ◽  
O. N. Shcherbakov
Keyword(s):  
Work Hardening ◽  
Surface Work

Effectiveness of surface work-hardening as a means of increasing the fatigue and corrosion-fatigue strength of some stainless steels

1968 ◽  
Vol 2 (6) ◽  
pp. 468-470
Author(s):  
V. I. Pokhmurskii ◽  
A. V. Boltarovich ◽  
M. M. Shved ◽  
G. V. Karpenko
Keyword(s):  
Fatigue Strength ◽  
Corrosion Fatigue ◽  
Stainless Steels ◽  
Work Hardening ◽  
Corrosion Fatigue Strength ◽  
Surface Work

Investigation of the Surface Characteristics for the Micro-Cutting Process with Finite Element Simulation

2010 ◽  
Vol 638-642 ◽  
pp. 2531-2536
Author(s):  
Hermann Autenrieth ◽  
Matthias Weber ◽  
M. Deuchert ◽  
Volker Schulze
Keyword(s):  
Finite Element ◽  
Residual Stresses ◽  
Simulation Model ◽  
Work Hardening ◽  
Surface Characteristics ◽  
Cutting Edge ◽  
Cutting Depth ◽  
Micro Cutting ◽  
Cutting Edge Radius ◽  
Surface Work

As the service life of components is significantly influenced by the surface layer properties, namely surface roughness, surface work hardening and residual stresses, these are the focus of many investigations. As these properties can be measured experimentally in many cases only after finish of the process, simulation models can be used to explain the final process results by the interpretation of the development of the result quantities during the loading and unloading state. The developed and validated simulation model and the extended process knowledge can be used afterwards to predict process parameter combinations with optimal process results for other cutting tool-workpiece combinations without performing large and costly experimental investigations. In the present study, the dependences of surface work hardening and residual stresses on process parameters of micro-cutting, namely cutting depth, cutting velocity and cutting edge radius are investigated by 2D finite element simulations using ABAQUS/Standard. The material behaviour of normalized AISI 1045 is described in dependence of strain, strain rate, and temperature. Chip formation is modelled by continued remeshing of the work piece. The simulation results are validated by the comparison with experimentally determined integral width and residual stress depth profiles, using x-ray diffraction method. The influence of the ploughing process, characterized by the ratio of cutting edge radius to cutting depth, on surface characteristics is well described by the simulation model.

Residual Stress Relaxation and Cyclic Deformation Behavior of Deep Rolled AlMg4.5Mn (AA5083) at Elevated Temperatures

2005 ◽  
Vol 490-491 ◽  
pp. 436-441 ◽  
Author(s):  
P. Juijerm ◽  
I. Altenberger ◽  
U. Noster ◽  
Berthold Scholtes
Keyword(s):  
Work Hardening ◽  
Deformation Behavior ◽  
Fatigue Behavior ◽  
Cyclic Hardening ◽  
Fatigue Tests ◽  
Plastic Strain Amplitude ◽  
Deep Rolling ◽  
Near Surface ◽  
Surface Work ◽  
Compressive Residual Stresses

The cyclic deformation behavior of deep rolled and polished aluminium wrought alloy AlMg4,5Mn in the temperature range 20-300°C has been investigated. Results of quasistatic tension and compression tests of untreated specimens in the temperature range 20-300°C are presented. To characterize the fatigue behavior for stress-controlled tests as a function of test temperature, s-n curves, cyclic deformations curves and mean strains as a function of number of cycles are given. The residual stress- and work hardening states near the surface of deep rolled aluminium alloy AlMg4.5Mn before and after fatigue tests were investigated by X-ray diffraction methods. The investigated AlMn4.5Mn aluminium alloy shows cyclic hardening until fracture at all stress amplitudes in stress-controlled fatigue tests at 25-150°C. With increasing temperature the deformation behavior shifts from cyclic hardening to cyclic softening. Below a certain stress amplitude at a given temperature deep rolling led to a reduction of the plastic strain amplitude as compared to the untreated state through cyclically stable near-surface work hardening as indicated by stable FWHM-values. This reduction in plastic strain amplitude is associated with enhanced fatigue lives. The effectiveness of deep rolling is governed by the cyclic and thermal stability of nearsurface work hardening rather than macroscopic compressive residual stresses. Since nearsurface work hardening is known to retard crack initiation, deep rolling is also effective in temperature- and stress ranges where macroscopic compressive residual stresses have relaxed almost completely, but where near-surface work hardening prevails. Above certain stress amplitudes and temperatures, deep rolling has no beneficial effect on the fatigue behavior of AlMg4.5Mn. This is a consequence of instable near-surface microstructures, especially instable near-surface work hardening.

Effect of surface work hardening on the life of high-strength steel

1976 ◽  
Vol 8 (7) ◽  
pp. 855-857
Author(s):  
A. B. Kuslitskii ◽  
I. P. Pistun
Keyword(s):  
Work Hardening ◽  
High Strength Steel ◽  
High Strength ◽  
Surface Work ◽  
Effect Of Surface
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