Zobrazeno 1 - 10
of 23
pro vyhledávání: '"J W Elmer"'
Publikováno v:
Welding in the World. 66:2053-2071
Reduced pressure laser welds were made using a 6-kW commercial fiber-laser system on Ti-6Al-4 V and compared to electron beam welds of the same beam diameters as measured by beam diagnostics. The laser welds showed keyhole characteristics under easil
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 4, Iss 5, p 053502 (2001)
Diffusion bonding and brazing of high purity copper were investigated to develop procedures for joining precision machined copper components for the Next Linear Collider (NLC). Diffusion bonds were made over a range of temperatures from 400 °C to 10
Externí odkaz:
https://doaj.org/article/0bc930a107b84d40811ef51d21d44fac
Publikováno v:
Materials Science and Engineering: A. 459:151-155
Synchrotron radiation was used to directly observe the transformation of ferrite, austenite and sigma phases during heating and cooling of 2205 duplex stainless steel. Sigma formed during the initial stages of heating, dissolved as the temperature wa
Publikováno v:
Metallurgical and Materials Transactions A. 38:464-475
The formation and growth of sigma (σ) phase in 2205 duplex stainless steel (DSS) was observed and measured in real time using synchrotron radiation during 10 hour isothermal heat treatments at temperatures between 700 °C and 850 °C. Sigma formed i
Publikováno v:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 24:978-987
In situ x-ray diffraction was performed while annealing thin film Au∕Cu binary diffusion couples to directly observe diffusion at elevated temperatures. The temperature dependence of the interdiffusion coefficient was determined from isothermal mea
Publikováno v:
Materials Science and Engineering: A. 374:307-321
Time resolved X-ray diffraction (TRXRD) measurements are made in the heat affected zone (HAZ) of 2205 duplex stainless steel (DSS) spot welds. Both the γ → δ and δ → γ transformations are monitored as a function of time during the rapid spot
Publikováno v:
Acta Materialia. 50:4763-4781
In situ time-resolved X-ray diffraction (TRXRD) using synchrotron radiation was used to monitor the phase evolution during welding of Fe-C-Al-Mn steel with 0.05 s resolutions. The primary solidification phase under rapid- and slow-cooling rate condit
Publikováno v:
Acta Materialia. 48:4813-4825
The work reported here represents significant advancement in the modeling of grain structure evolution in metallic systems. Utilizing computed temperature fields from a well tested heat transfer and fluid flow model, the evolution of grain structure
Publikováno v:
Journal of Materials Science. 32:1493-1500
Spatially resolved X-ray diffraction (SRXRD) technique has been applied using synchrotron radiation to map the phases present in fusion welds in situ with a sub-millimetre resolution. For titanium, exhibiting an allotropic transformation from a hcp