In-situ Studies with Photons, Neutrons and Electrons Scattering II

This book provides an insight into current research topics, focusing special attention exactly on welding issues. The presented research work demonstrates that application of synchrotron and neutron radiation in combination with other techniques enables the basic understanding of material-related processes to be extended appreciably. It also shows ways of how to improve new materials and their use in industry.
Following on from the 1st workshop in 2009 at BAM Berlin, a 2nd workshop dealing with this subject matter was held in 28-30 November, 2012 in Osaka/Japan with international participation of scientists from sixteen countries. The book includes selected contributions from the various subject blocks, precisely covering issues of practical and immediately implementable benefit to industrial enterprises. Therefore, peer-reviewed papers dealing with the following topics are contained as well:

• Phase transformation during welding, metallurgy and material development
• Evolution and significance of residual stresses

• Investigations into laser and electron beam welding

  Inhalt

  Hybrid system for in-situ observation of microstructure evolution in steel materials.- In-situ Phase transformation study in fine grained heat affected zone of Grade 91 steels.- In-situ synchrotron diffraction studies on peak broadening during bainitic transformation in a high strength quenched and tempered steel.- In-situ synchrotron diffraction studies on the formation, decomposition and stabilisation of austenite in TRIP steels during simulated weld thermal cycles.- In-situ observation of lattice-strain and solid state transformation in low temperature transformation weld metal by synchrotron X-rays.- Compressive residual stress in welded joints with low-temperature-transformation weld metal in high-strength steel.- In-situ observation of changing crystal orientations during austenite grain coarsening.- In-situ observations of microstructural evolution during annealing or deformation in an electro-deposited fine-grained iron.- In situ measurements of hydrogen diffusion in duplex stainless steels by neutron radiography.- High-energy Synchrotron Study of the Stress-strain Behavior of Hydrogen-charged High Strength Structural Steel.- Determination of the Welding Residual Stress Field by Diffraction Methods and Studying its Behavior under uniaxial and multiaxial Mechanical Loading.- Visualization Technique for Quantitative Evaluation in Laser Welding Processes.- Investigation of Processes in the Keyhole of Electron-Beam Welding by Monitoring the Secondary Current Signal in the Plasma.- Development in in-situ observation of deformation in semi-solid alloys using X-ray imaging.- Advanced Facility For Parallel Thermo-Mechanical Simulation and Synchrotron X-Ray Diffraction.