Journal Article

PUBDB-2019-03286

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Quantitative Assessment of the Time to End Bainitic Transformation

Santajuana, M. A. ; Eres-Castellanos, A. ; Ruiz-Jimenez, V. ; Allain, S. ; Geandier, G. ; Caballero, F. G. ; Garcia-Mateo, C. (Corresponding author)

2019
MDPI Basel

This record in other databases:      

Please use a persistent id in citations: doi:10.3390/met9090925  doi:10.3204/PUBDB-2019-03286

Abstract: Low temperature bainite consists of an intimate mixture of bainitic ferrite and retainedaustenite, usually obtained by isothermal treatments at temperatures close to the martensite starttemperature and below the bainite start temperature. There is widespread belief regarding theextremely long heat treatments necessary to achieve such a microstructure, but still there are nounified and objective criteria to determine the end of the bainitic transformation that allow formeaningful results and its comparison. A very common way to track such a transformation is bymeans of a high-resolution dilatometer. The relative change in length associated with the bainitictransformation has a very characteristic sigmoidal shape, with low transformation rates at thebeginning and at end of the transformation but rapid in between. The determination of the end oftransformation is normally subjected to the ability and experience of the “operator” and is thereforesubjective. What is more, in the case of very long heat treatments, like those needed for lowtemperature bainite (from hours to days), dierences in the criteria used to determine the end oftransformation might lead to dierences that might not be assumable from an industrial point ofview. This work reviews some of the most common procedures and attempts to establish a generalcriterion to determine the end of bainitic transformation, based on the dierential change in length(transformation rate) derived from a single experiment. The proposed method has been validatedby means of the complementary use of hardness measurements, X-ray diraction and in situ highenergy X-ray diraction.

---

Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (POF3-622) (POF3-622)

Experiment(s):

1. PETRA Beamline P07 (PETRA III)

Appears in the scientific report 2019

---

Database coverage:
; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---