Effect of edge conditions on the formability of commercially pure titanium sheet (Grade 2) at room temperature

Research output: Contribution to conferencePaper

Abstract

Titanium and its alloys are difficult to form, particularly at room temperature, due to their crystallographic structure and limited availability of slip systems. Such limited formability could be exacerbated by virtue of the technique used to cut the sheet. Forming limit diagrams will not necessarily recognize such effects, which can lead to failures during forming trials. An example of a situation where this could be demonstrated is in sheet with pre-fabricated holes. This work used a hemispherical punch to stretch in-plane a 20mm diameter hole prepared with laser, EDM and AWJ cutting techniques in order to quantify the edge formability of the material. It was identified that, the edge surface conditions have a major impact on the edge formability of the material. The edges of the material prepared with EDM showed very high formability tendencies compared with AWJ and laser cutting. The work proposed an alternative characterization method that could be adopted for edge formability assessment.
LanguageEnglish
Pages1-6
Number of pages6
Publication statusPublished - 10 Jun 2019
EventThe 14th World Conference on Titanium - Nantes, France
Duration: 10 Jun 201914 Jun 2019

Conference

ConferenceThe 14th World Conference on Titanium
CountryFrance
CityNantes
Period10/06/1914/06/19

Fingerprint

Titanium sheet
Formability
Temperature
Lasers
Titanium alloys
Titanium
Availability

Keywords

  • hole expansion test
  • edge surface defects
  • hole expansion ratio
  • edge formality
  • manufacturing
  • materials
  • titanium
  • alloys

Cite this

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title = "Effect of edge conditions on the formability of commercially pure titanium sheet (Grade 2) at room temperature",
abstract = "Titanium and its alloys are difficult to form, particularly at room temperature, due to their crystallographic structure and limited availability of slip systems. Such limited formability could be exacerbated by virtue of the technique used to cut the sheet. Forming limit diagrams will not necessarily recognize such effects, which can lead to failures during forming trials. An example of a situation where this could be demonstrated is in sheet with pre-fabricated holes. This work used a hemispherical punch to stretch in-plane a 20mm diameter hole prepared with laser, EDM and AWJ cutting techniques in order to quantify the edge formability of the material. It was identified that, the edge surface conditions have a major impact on the edge formability of the material. The edges of the material prepared with EDM showed very high formability tendencies compared with AWJ and laser cutting. The work proposed an alternative characterization method that could be adopted for edge formability assessment.",
keywords = "hole expansion test, edge surface defects, hole expansion ratio, edge formality, manufacturing, materials, titanium, alloys",
author = "Kwame, {J. S.} and E. Yakushina and P. Blackwell",
year = "2019",
month = "6",
day = "10",
language = "English",
pages = "1--6",
note = "The 14th World Conference on Titanium ; Conference date: 10-06-2019 Through 14-06-2019",

}

Kwame, JS, Yakushina, E & Blackwell, P 2019, 'Effect of edge conditions on the formability of commercially pure titanium sheet (Grade 2) at room temperature' Paper presented at The 14th World Conference on Titanium, Nantes, France, 10/06/19 - 14/06/19, pp. 1-6.

Effect of edge conditions on the formability of commercially pure titanium sheet (Grade 2) at room temperature. / Kwame, J. S.; Yakushina, E.; Blackwell, P.

2019. 1-6 Paper presented at The 14th World Conference on Titanium, Nantes, France.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Effect of edge conditions on the formability of commercially pure titanium sheet (Grade 2) at room temperature

AU - Kwame, J. S.

AU - Yakushina, E.

AU - Blackwell, P.

PY - 2019/6/10

Y1 - 2019/6/10

N2 - Titanium and its alloys are difficult to form, particularly at room temperature, due to their crystallographic structure and limited availability of slip systems. Such limited formability could be exacerbated by virtue of the technique used to cut the sheet. Forming limit diagrams will not necessarily recognize such effects, which can lead to failures during forming trials. An example of a situation where this could be demonstrated is in sheet with pre-fabricated holes. This work used a hemispherical punch to stretch in-plane a 20mm diameter hole prepared with laser, EDM and AWJ cutting techniques in order to quantify the edge formability of the material. It was identified that, the edge surface conditions have a major impact on the edge formability of the material. The edges of the material prepared with EDM showed very high formability tendencies compared with AWJ and laser cutting. The work proposed an alternative characterization method that could be adopted for edge formability assessment.

AB - Titanium and its alloys are difficult to form, particularly at room temperature, due to their crystallographic structure and limited availability of slip systems. Such limited formability could be exacerbated by virtue of the technique used to cut the sheet. Forming limit diagrams will not necessarily recognize such effects, which can lead to failures during forming trials. An example of a situation where this could be demonstrated is in sheet with pre-fabricated holes. This work used a hemispherical punch to stretch in-plane a 20mm diameter hole prepared with laser, EDM and AWJ cutting techniques in order to quantify the edge formability of the material. It was identified that, the edge surface conditions have a major impact on the edge formability of the material. The edges of the material prepared with EDM showed very high formability tendencies compared with AWJ and laser cutting. The work proposed an alternative characterization method that could be adopted for edge formability assessment.

KW - hole expansion test

KW - edge surface defects

KW - hole expansion ratio

KW - edge formality

KW - manufacturing

KW - materials

KW - titanium

KW - alloys

M3 - Paper

SP - 1

EP - 6

ER -