Journal Article

PUBDB-2016-03696

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Effect of laser welding parameters on the austenite and martensite phase fractions of NiTi

Oliveira, J. P. (Corresponding author)Extern* ; Braz Fernandes, F. M.Extern* ; Miranda, R. M. ; Schell, N.HZG* ; Ocaña, J. L.

2016
Science Direct New York, NY

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Please use a persistent id in citations: doi:10.1016/j.matchar.2016.08.001  doi:10.3204/PUBDB-2016-03696

Abstract: Although laser welding is probably the most used joining technique for NiTi shape memory alloys there is still alack of understanding about the effects of laser welding parameters on the microstructural induced changes: inboth the heat affected and fusion zones martensite may be present, while the base material is fully austenitic.Synchrotron X-ray diffraction was used for fine probing laser welded NiTi joints. Through Rietveld refinementthe martensite and austenite phase fractions were determined and it was observed that the martensite contentincreases towards the weld centreline. This is related to a change of the local transformation temperatures onthese regions, which occurs due to compositional variation in those regions. The martensite phase fraction inthe thermally affected regions may have significant implications on functional properties on these joints.

Note: (c) Elsevier Inc.

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Contributing Institute(s):

1. DOOR-User (DOOR)
2. Zentrum für Material- und Küstenforschung (HZG)

Research Program(s):

1. 6G3 - PETRA III (POF3-622) (POF3-622)
2. 6213 - Materials and Processes for Energy and Transport Technologies (POF3-621) (POF3-621)
3. FS-Proposal: I-20120563 EC (I-20120563-EC) (I-20120563-EC)
4. CALIPSO - Coordinated Access to Lightsources to Promote Standards and Optimization (312284) (312284)

Experiment(s):

1. PETRA Beamline P07 (PETRA III)

Appears in the scientific report 2016

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Database coverage:
; ; Current Contents - Engineering, Computing and Technology ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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