Robert C. Wimpory
YOU?
Author Swipe
View article: Characterizing Changes in Grain Growth, Mechanical Properties, and Transformation Properties in Differently Sintered and Annealed Binder-Jet 3D Printed 14M Ni–Mn–Ga Magnetic Shape Memory Alloys
Characterizing Changes in Grain Growth, Mechanical Properties, and Transformation Properties in Differently Sintered and Annealed Binder-Jet 3D Printed 14M Ni–Mn–Ga Magnetic Shape Memory Alloys Open
Ni–Mn–Ga Heusler alloys are multifunctional materials that demonstrate macroscopic strain under an externally applied magnetic field through the motion of martensite twin boundaries within the microstructure. This study sought to comprehen…
View article: FACTORS INFLUENCING THE SAMPLED GAUGE VOLUME (SGV) WHEN MEASURING IN THE OUT OF PLANE (NORMAL) DIRECTION
FACTORS INFLUENCING THE SAMPLED GAUGE VOLUME (SGV) WHEN MEASURING IN THE OUT OF PLANE (NORMAL) DIRECTION Open
International audience
View article: Uphill Quenching to Reduce Residual Stress in Aluminium Alloy 7449 Hollow Structures
Uphill Quenching to Reduce Residual Stress in Aluminium Alloy 7449 Hollow Structures Open
Background Uphill quenching (UHQ) of heat treatable aluminium alloy components is a long established but rarely practiced or investigated method of reducing residual stresses. The efficacy of the technique has not been quantified on thin w…
View article: Formation of residual stresses during quenching of Ti17 and Ti–6Al–4V alloys: Influence of phase transformations
Formation of residual stresses during quenching of Ti17 and Ti–6Al–4V alloys: Influence of phase transformations Open
View article: Correction to: Residual stress relaxation in HFMI-treated fillet welds after single overload peaks
Correction to: Residual stress relaxation in HFMI-treated fillet welds after single overload peaks Open
View article: Scanning Manufacturing Parameters Determining the Residual Stress State in LPBF IN718 Small Parts
Scanning Manufacturing Parameters Determining the Residual Stress State in LPBF IN718 Small Parts Open
The influence of scan strategy on the residual stress (RS) state of an as‐built IN718 alloy produced by means of laser powder bed fusion (LPBF) is investigated. Two scan vector rotations (90°‐alternation and 67°‐rotation), each produced fo…
View article: Influence of welding stresses on relief cracking during heat treatment of a creep-resistant 13CrMoV steel Part III: assessment of residual stresses from small-scale to real component welds
Influence of welding stresses on relief cracking during heat treatment of a creep-resistant 13CrMoV steel Part III: assessment of residual stresses from small-scale to real component welds Open
For higher operational temperatures and pressures required in petrochemical plants, the modified 13CrMoV9-10 steel was developed providing high resistance against creep and compressed hydrogen. Extreme care during the welding procedure is …
View article: A correlation between microstructure and residual stress in the 6061 Al–Mg–Si alloy with different thermomechanical process
A correlation between microstructure and residual stress in the 6061 Al–Mg–Si alloy with different thermomechanical process Open
View article: Stress Distributions in P91 Martensitic Steel and in AISI 316LN Steel Welds for Gen IV Nuclear Applications
Stress Distributions in P91 Martensitic Steel and in AISI 316LN Steel Welds for Gen IV Nuclear Applications Open
Neutron diffraction has been used to investigate the stress field in two different welds developed fornuclear applications, namely those obtained by tungsten inert gas welding of P91 martensitic steel (Cr 9, Mn6, Mo 1, C 0.1, and Fe bal wt…
View article: Neutron diffraction measurements of weld residual stresses in three-pass slot weld (Alloy 600/82) and assessment of the measurement uncertainty
Neutron diffraction measurements of weld residual stresses in three-pass slot weld (Alloy 600/82) and assessment of the measurement uncertainty Open
This paper describes in detail two neutron diffraction residual stress measurements, performed on the ENGIN-X neutron scattering instrument at the ISIS facility in the UK and on the SALSA instrument at the Institut Laue–Langevin in Grenobl…
View article: Grain Growth, Porosity, and Hardness Changes in Sintered and Annealed Binder-jet 3D Printed Ni-Mn-Ga Magnetic Shape Memory Alloys
Grain Growth, Porosity, and Hardness Changes in Sintered and Annealed Binder-jet 3D Printed Ni-Mn-Ga Magnetic Shape Memory Alloys Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: Thermo-mechanical simulation of overlaid layers made with wire + arc additive manufacturing and GMAW-cold metal transfer
Thermo-mechanical simulation of overlaid layers made with wire + arc additive manufacturing and GMAW-cold metal transfer Open
View article: Residual stress relaxation in HFMI-treated fillet welds after single overload peaks
Residual stress relaxation in HFMI-treated fillet welds after single overload peaks Open
The induction of near-surface compressive residual stress is an important factor for fatigue life improvement of HFMI-treated welded joints. However, the relaxation of these beneficial residual stresses under single overload peaks under va…
View article: Residual Stress, Microstructure and Mechanical Properties in Thick 6005A-T6 Aluminium Alloy Friction Stir Welds
Residual Stress, Microstructure and Mechanical Properties in Thick 6005A-T6 Aluminium Alloy Friction Stir Welds Open
Plates (37 mm thick) of 6005A-T6 aluminum alloy were butt joined by a single-sided and double-sided friction stir welding (FSW). The 3D residual stresses in the joints were determined using neutron diffraction. The microstructures were cha…
View article: A novel manufacturing process and validated predictive model for high-strength and low-residual stresses in extra-large 7xxx panels
A novel manufacturing process and validated predictive model for high-strength and low-residual stresses in extra-large 7xxx panels Open
View article: Residual Lattice Strain and Phase Distribution in Ti-6Al-4V Produced by Electron Beam Melting
Residual Lattice Strain and Phase Distribution in Ti-6Al-4V Produced by Electron Beam Melting Open
Residual stress/strain and microstructure used in additively manufactured material are strongly dependent on process parameter combination. With the aim to better understand and correlate process parameters used in electron beam melting (E…
View article: Analysis of Residual Stress State in Deep-Rolled HT-Bolts
Analysis of Residual Stress State in Deep-Rolled HT-Bolts Open
Analysis of Residual Stress State in Deep-Rolled HT-Bolts J. Unglaub, J. Hensel, R. Wimpory, T. Nitschke-Pagel, K. Dilger, K. Thiele Abstract. Results of residual stress measurements of HT-bolts gained by neutron diffraction at HZB will be…
View article: Use of Symmetry for Residual Stress Determination
Use of Symmetry for Residual Stress Determination Open
Use of Symmetry for Residual Stress Determination R.C. Wimpory, M. Hofmann Abstract. Instrumental and certain sample characteristics can affect the detected Bragg peak shifts which are not related to the strain being measured. Three major …
View article: Understanding the negative thermal expansion in planar graphite–metal composites
Understanding the negative thermal expansion in planar graphite–metal composites Open
View article: The NeT Task Group 4 residual stress measurement and analysis round robin on a three-pass slot-welded plate specimen
The NeT Task Group 4 residual stress measurement and analysis round robin on a three-pass slot-welded plate specimen Open
View article: Numerical simulation of a three-pass TIG welding using finite element method with validation from measurements
Numerical simulation of a three-pass TIG welding using finite element method with validation from measurements Open
View article: E3: Residual Stress Neutron Diffractometer at BER II
E3: Residual Stress Neutron Diffractometer at BER II Open
The E3 residual stress neutron diffractometer operated at Helmholtz-Zentrum Berlin (HZB) is designed for studies in material science and engineering applications. Recent upgrade activities have made the instrument faster and more adaptable…
View article: Quantification of residual stresses in electron beam welded fracture mechanics specimens
Quantification of residual stresses in electron beam welded fracture mechanics specimens Open
View article: Neutron diffraction stress determination in W-laminates for structural divertor applications
Neutron diffraction stress determination in W-laminates for structural divertor applications Open
View article: Texture gradient in a copper tube at maximum and minimum wall thickness
Texture gradient in a copper tube at maximum and minimum wall thickness Open
Tube drawing is an inhomogeneous process with anisotropic flow. Quantitative texture analysis was used to get inside in eccentricity and ovality of a Cu-tube drawn without a plug. To obtain the texture gradient over the wall thickness high…