Synchrotron X-ray study of vacuum brazed 316L stainless steel joints
(2025) The 14th International Conference on Brazing, High Temperature Brazing and Diffusion Bonding In DVS Berichte 399. p.114-119- Abstract
- Nickel phosphide is a valuable material in high-temperature brazing and joining applications, offering excellent thermal stability for temperatures up to 400°C. Nickel phosphide is used as powder form for joining applications and therefore it is imperative to study the formation as well as interaction of Ni2P particles with Brazing with nickel-chromium-based fillers is widely used to join stainless steel components in applications such as heat exchangers, where strong, corrosion-resistant joints are essential. Silicon and boron additives lower the filler melting temperature but can promote the formation of chromium-rich precipitates near the joint. This study characterizes such precipitates in AISI 316 stainless steel brazed with a... (More)
- Nickel phosphide is a valuable material in high-temperature brazing and joining applications, offering excellent thermal stability for temperatures up to 400°C. Nickel phosphide is used as powder form for joining applications and therefore it is imperative to study the formation as well as interaction of Ni2P particles with Brazing with nickel-chromium-based fillers is widely used to join stainless steel components in applications such as heat exchangers, where strong, corrosion-resistant joints are essential. Silicon and boron additives lower the filler melting temperature but can promote the formation of chromium-rich precipitates near the joint. This study characterizes such precipitates in AISI 316 stainless steel brazed with a Ni-Cr-Si-B filler using high resolution synchrotron hard X-ray fluorescence (XRF) and diffraction (XRD). XRF identified Cr-rich precipitates, while XRD revealed diffraction patterns consistent with space group number 70, with lattice parameters a = 4.26 Å, b = 7.38 Å, and c = 14.70 Å. Combined with SEM XEDS analysis, the results suggest the precipitates are Cr₂B or (Cr,Fe)₂B. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/e145fdcb-f9aa-4084-9747-5a36c74ee1c1
- author
- Lenrick, F.
LU
; Lazar, I. ; Rajashekar, P. LU ; Yondu, I. LU ; Bhattacharya, R. LU ; Slama, Martin ; Knutsson, Axel and Mikkelsen, A. LU
- organization
-
- Sentio: Integrated Sensors and Adaptive Technology for Sustainable Products and Manufacturing
- LU Profile Area: Light and Materials
- LTH Profile Area: Nanoscience and Semiconductor Technology
- SPI: Sustainable Production Initiative
- Production and Materials Engineering
- NanoLund: Centre for Nanoscience
- Centre for Analysis and Synthesis
- LTH Profile Area: Photon Science and Technology
- Synchrotron Radiation Research
- publishing date
- 2025-06
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Stainless steel 316L, Synchrotron diffraction, X-ray fluorescence spectroscopy, High resolution spectroscopy, Max IV, Brazing, Joining, Bonding, Scanning electron microscopy, NanoMAX, Energy dispersive X-ray spectroscopy
- host publication
- Brazing, high temperature brazing and diffusion bonding : LÖT 2025 - LÖT 2025
- series title
- DVS Berichte
- volume
- 399
- article number
- 3
- edition
- DVS Berichte
- pages
- 6 pages
- publisher
- DVS Media GmbH, Düsseldorf 2025, Printing by WirmachenDruck GmbH, Backnang
- conference name
- The 14th International Conference on Brazing, High Temperature Brazing and Diffusion Bonding
- conference location
- Aachen, Germany
- conference dates
- 2025-06-24 - 2025-06-26
- ISSN
- 0418-9639
- ISBN
- 978-3-96144-294-2
- 978-3-96144-295-9
- DOI
- 10.53192/LOET20250114
- language
- English
- LU publication?
- yes
- id
- e145fdcb-f9aa-4084-9747-5a36c74ee1c1
- date added to LUP
- 2025-08-30 11:57:00
- date last changed
- 2025-09-19 02:50:18
@inproceedings{e145fdcb-f9aa-4084-9747-5a36c74ee1c1, abstract = {{Nickel phosphide is a valuable material in high-temperature brazing and joining applications, offering excellent thermal stability for temperatures up to 400°C. Nickel phosphide is used as powder form for joining applications and therefore it is imperative to study the formation as well as interaction of Ni2P particles with Brazing with nickel-chromium-based fillers is widely used to join stainless steel components in applications such as heat exchangers, where strong, corrosion-resistant joints are essential. Silicon and boron additives lower the filler melting temperature but can promote the formation of chromium-rich precipitates near the joint. This study characterizes such precipitates in AISI 316 stainless steel brazed with a Ni-Cr-Si-B filler using high resolution synchrotron hard X-ray fluorescence (XRF) and diffraction (XRD). XRF identified Cr-rich precipitates, while XRD revealed diffraction patterns consistent with space group number 70, with lattice parameters a = 4.26 Å, b = 7.38 Å, and c = 14.70 Å. Combined with SEM XEDS analysis, the results suggest the precipitates are Cr₂B or (Cr,Fe)₂B.}}, author = {{Lenrick, F. and Lazar, I. and Rajashekar, P. and Yondu, I. and Bhattacharya, R. and Slama, Martin and Knutsson, Axel and Mikkelsen, A.}}, booktitle = {{Brazing, high temperature brazing and diffusion bonding : LÖT 2025}}, isbn = {{978-3-96144-294-2}}, issn = {{0418-9639}}, keywords = {{Stainless steel 316L; Synchrotron diffraction; X-ray fluorescence spectroscopy; High resolution spectroscopy; Max IV; Brazing; Joining; Bonding; Scanning electron microscopy; NanoMAX; Energy dispersive X-ray spectroscopy}}, language = {{eng}}, pages = {{114--119}}, publisher = {{DVS Media GmbH, Düsseldorf 2025, Printing by WirmachenDruck GmbH, Backnang}}, series = {{DVS Berichte}}, title = {{Synchrotron X-ray study of vacuum brazed 316L stainless steel joints}}, url = {{http://dx.doi.org/10.53192/LOET20250114}}, doi = {{10.53192/LOET20250114}}, volume = {{399}}, year = {{2025}}, }