Detail publikace

Influence of post weld heat treatments on structure of electron beam welds of Ti-6Al-4V alloy

Originální název

Influence of post weld heat treatments on structure of electron beam welds of Ti-6Al-4V alloy

Anglický název

Influence of post weld heat treatments on structure of electron beam welds of Ti-6Al-4V alloy

Jazyk

en

Originální abstrakt

Electron beam (EB) welding belongs among the most appropriate welding methods for joining of titanium alloys mainly due to the advantages which are resulting from the using of this method. The required presence of vacuum during EB process may lenghten the overall processing time, but also provide protective enviroment which is necessary for the quality welds of titanium alloys. The precision control of EB welding process allows irradiating the workpiece by EB with high density of energy. This reduces the quanitity of heat input to the material and results in deep and narrow welds with the minimum heat affected zone. In many materials this can lead to the formation of significant thermal stresses during solidification of weld metal which can promote the nucleation of cracks. The post-weld heat treatment (PWHT) may be used to eliminate these stresses. In this article the microstructure and microhardness of EB welds of Ti-6Al-4V alloy is studied. The welds are evaluated in the as-welded state and after five different modes of the PWHT. Additionally, the presence and distribution of defects was examined depending on the used parameters of EB irradiation.

Anglický abstrakt

Electron beam (EB) welding belongs among the most appropriate welding methods for joining of titanium alloys mainly due to the advantages which are resulting from the using of this method. The required presence of vacuum during EB process may lenghten the overall processing time, but also provide protective enviroment which is necessary for the quality welds of titanium alloys. The precision control of EB welding process allows irradiating the workpiece by EB with high density of energy. This reduces the quanitity of heat input to the material and results in deep and narrow welds with the minimum heat affected zone. In many materials this can lead to the formation of significant thermal stresses during solidification of weld metal which can promote the nucleation of cracks. The post-weld heat treatment (PWHT) may be used to eliminate these stresses. In this article the microstructure and microhardness of EB welds of Ti-6Al-4V alloy is studied. The welds are evaluated in the as-welded state and after five different modes of the PWHT. Additionally, the presence and distribution of defects was examined depending on the used parameters of EB irradiation.

Dokumenty

BibTex


@inproceedings{BUT114902,
  author="Petr {Havlík} and Jan {Kouřil} and Rudolf {Foret}",
  title="Influence of post weld heat treatments on structure of electron beam welds of Ti-6Al-4V alloy",
  annote="Electron beam (EB) welding belongs among the most appropriate welding methods for joining of titanium
alloys mainly due to the advantages which are resulting from the using of this method. The required presence
of vacuum during EB process may lenghten the overall processing time, but also provide protective enviroment
which is necessary for the quality welds of titanium alloys. The precision control of EB welding process allows
irradiating the workpiece by EB with high density of energy. This reduces the quanitity of heat input to the
material and results in deep and narrow welds with the minimum heat affected zone. In many materials this
can lead to the formation of significant thermal stresses during solidification of weld metal which can promote
the nucleation of cracks. The post-weld heat treatment (PWHT) may be used to eliminate these stresses. In this
article the microstructure and microhardness of EB welds of Ti-6Al-4V alloy is studied. The welds are evaluated
in the as-welded state and after five different modes of the PWHT. Additionally, the presence and distribution
of defects was examined depending on the used parameters of EB irradiation.",
  address="Brno University of Technology, Antonínská 548/1, 601 90 Brno",
  booktitle="MULTI-SCALE DESIGN OF ADVANCED MATERIALS CONFERENCE PROCEEDINGS",
  chapter="114902",
  howpublished="online",
  institution="Brno University of Technology, Antonínská 548/1, 601 90 Brno",
  year="2015",
  month="may",
  pages="131--138",
  publisher="Brno University of Technology, Antonínská 548/1, 601 90 Brno",
  type="conference paper"
}