scholarly journals COMPARISON OF PARAMETERS OF SURFACE INTEGRITY OF MACHINED DUPLEX AND AUSTENITE STAINLESS STEELS IN RELATION TO TOOL GEOMETRY

2017 ◽  
Vol 9 ◽  
pp. 1
Author(s):  
Jiří Čapek ◽  
Zdeněk Pitrmuc ◽  
Kamil Kolařík ◽  
Libor Beránek ◽  
Nikolaj Ganev
Keyword(s):  
Residual Stresses ◽  
Surface Integrity ◽  
Rake Angle ◽  
Optical Microscope ◽  
Hole Drilling ◽  
Tool Geometry ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hole Drilling Method ◽  
Drilling Method

The goal of this contribution was to describe parameters of surface integrity of two machined materials; austenite and duplex stainless steel. Residual stresses and presence of straininduced martensite were studied as a function of the side rake angle. Residual stresses of surface and sub-surface layers were determined using X-ray diffraction techniques and hole-drilling method. By using X-ray diffraction, it is possible to determine residual stresses in each phase separately, in comparison with hole-drilling method. The presence of strain-induced martensite was investigated using Barkhausen noise and optical microscope.

scholarly journals The Effect of Specimen Size on Residual Stresses in Friction Stir Welded Aluminum Components

2014 ◽  
Vol 996 ◽  
pp. 445-450 ◽  
Author(s):  
Wulf Pfeiffer ◽  
Eduard Reisacher ◽  
Michael Windisch ◽  
Markus Kahnert
Keyword(s):  
Residual Stresses ◽  
Specimen Size ◽  
Hole Drilling ◽  
X Ray Diffraction ◽  
X Ray ◽  
Friction Stir ◽  
Metal Parts ◽  
Hole Drilling Method ◽  
Incremental Hole Drilling ◽  
Drilling Method

Friction stir welding (FSW) is a well-known technique which allows joining of metal parts without severe distortion. Because FSW involves less heat input relative to conventional welding, it may be assumed that cutting specimens from larger friction stir welded components results in a negligible redistribution of residual stresses. The aim of the investigations was to verify these assumptions for a welded aluminum plate and a circumferentially-welded aluminum cylinder. Strain gage measurements, X-ray diffraction and the incremental hole drilling method were used.

Residual Stresses Profiles of Cladded Austenitic Stainless Steel Evaluated by X-Ray Diffraction and by Incremental Hole-Drilling Method

2013 ◽  
Vol 768-769 ◽  
pp. 464-469
Author(s):  
Maria José Marques ◽  
António Castanhola Batista ◽  
Luís Coelho ◽  
Joao P. Nobre ◽  
Altino Loureiro
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Residual Stresses ◽  
Hole Drilling ◽  
Stainless Steel Sample ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hole Drilling Method ◽  
Incremental Hole Drilling ◽  
Drilling Method

The samples studied in this paper were performed from carbon steel plates, cladded in one of the faces with stainless steel filler metals by submerged arc welding (SAW). After cladding work, the samples were submitted to post-weld heat treatments at different conditions and afterwards stainless steel coating surfaces were milled and mechanically polished, as in the industrial application. The residual stress analysis was performed by X-ray diffraction (XRD) and incremental hole-drilling methods (IHDM). The residual stresses profiles presented different in depth values in each sample, depending on the heat treatment conditions. The hole-drilling method was applied in several points of each stainless steel sample surface and the results presented similar evolution profiles. However compressive stresses increase with the increase of heat treatment temperature.

Investigation of Residual Stresses in Flame Sprayed Ni-Based Wear Resistant Coatings by the Hole-Drilling and X-Ray Methods

2013 ◽  
Vol 768-769 ◽  
pp. 144-149 ◽  
Author(s):  
Alexander Ryabchikov ◽  
Harri Lille ◽  
Renno Reitsnik ◽  
Stanislav Toropov ◽  
Andrei Surženkov ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Hole Drilling ◽  
Ray Method ◽  
X Ray ◽  
Wear Resistant Coatings ◽  
Hole Drilling Method ◽  
Incremental Hole Drilling ◽  
Hard Metals ◽  
Drilling Method ◽  
Main Components

The present investigation was carried out in order to determine residual stresses inNi-based self-fluxing alloy based high velocity oxy-fuel (HVOF) coatings with different wearresistant additives. The main components of the alloy were Ni, Cr, Si and B. To increase the wearresistance of self-fluxing NiCrSiB alloy based coatings, different ceramics and hard metals(WC-Co, TiC-NiMo and Cr2C3-Ni) were added. Residual stresses were measured by the holedrillingmethod and the X-ray method. The incremental hole-drilling technique combined with theintegral method was applied. This combined method allows to analyse non-uniform throughthicknessresidual stresses. The results obtained with the incremental hole-drilling method indicatethat through-thickness residual stress distribution is non-uniform. The determined residual stresseswere tensile on the surface of the coating and became compressive toward the interface.The values of the modulus of elasticity and microhardness of the coatings were obtained byinstrumented indentation. The microstructures of the studied coatings were investigated with theSEM technique.

Development of Weld Residual Stress Measurement Method for Primed Steels

2017 ◽  
Author(s):  
Y. P. Yang ◽  
R. Dull ◽  
T. D. Huang ◽  
H. Rucker ◽  
M. Harbison ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stress Measurement ◽  
Hole Drilling ◽  
Stress Distributions ◽  
X Ray Diffraction ◽  
Ship Structures ◽  
X Ray ◽  
Hole Drilling Method ◽  
Weld Residual Stress ◽  
Drilling Method

Welding, as a major manufacturing process in shipbuilding, induces residual stress and distortion that affects buckling strength, fatigue performance, corrosion resistance, and dimensional stability of ship structures. Understanding residual stress in ship structures is required in engineering design to ensure structural strength and safety and is essential in dimensional accuracy for distortion control during fabrication. However, measuring residual stress in ship structures presents unique challenges, such as structure complexity, surface primer, and a non-friendly measurement environment. Fortunately, portable X-ray diffraction equipment has been successfully developed and proven accurate in other industries to measure residual stress. This study is to evaluate the feasibility of measuring residual stress in a shipyard environment in terms of accuracy and adaptability. Typical welded joints (butt joint and T-joint) were selected for evaluation instead of evaluating complicated ship structures. The welded joints were fabricated using common shipyard welding procedures. This makes the evaluation easier since weld residual stress distributions and magnitudes on these joints are well understood. In addition, the hole-drilling method was also used to validate the X-ray diffraction results. Measured results show that X-ray diffraction can penetrate the pre-construction surface primer used in shipbuilding to directly measure residual stress of the metal surface, without the need to remove the surface primer. The residual stress data measured by X-ray diffraction agreed with the data obtained by the hole-drilling method. In addition, the residual stress trend measured by X-ray diffraction agreed with the theoretical residual-stress distributions. This study concluded that a portable X-ray diffraction is a potential technology for residual stress measurement in a shipyard.

Measurement of Residual Stress in Diesel Engine Castings

2014 ◽  
Vol 633 ◽  
pp. 455-458
Author(s):  
Ke Liu ◽  
Cheng Zhang ◽  
Yong Kang Pu ◽  
Hua Lin Hu ◽  
Zheng An Wu
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Hole Drilling ◽  
Structural Elements ◽  
X Ray Diffraction ◽  
Hole Drilling Method ◽  
Iron Castings ◽  
Drilling Method ◽  
Service Conditions ◽  
Properties Of Materials

The mechanical properties of materials and structural components, notably fatigue life, brittle fracture, dimensional stability, deformation and crack propagation can be considerably influenced by residual stresses inside bodies. Accordingly, residual stresses analysis is a compulsory stage in the design of parts and structural elements and in the estimation of their reliability under real service conditions. In this paper, x-ray diffraction and hole-drilling method were used to measure residual stresses in diesel iron castings. The purpose is to determine the residual stresses distribution and analyze the annealing process on the influence of residual stress.

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