Effect of Wire EDM on microstructure and fracture toughness of 7075-T6511 aluminum alloy

Daniel M. Madyira

Effect of Wire EDM on microstructure and fracture toughness of 7075-T6511 aluminum alloy

Daniel M. Madyira

Mechanical Engineering Science

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

4 Citations (Scopus)

Abstract

This paper reports on an investigation conducted to establish the influence of Wire Electrical Discharge Machining (WEDM) on the fracture toughness of aluminum 7075-T6511. The main objective was to determine if WEDM can be used to introduce a pre-crack into a compact tension specimen instead of the ASTM E-1820-11 specified fatigue pre-crack method. Fracture tests were conducted on four specimens which were pre-cracked using the WEDM technique. The rest of the fracture toughness evaluation followed the ASTM E-1820-11 guidelines. Results obtained from the experimental data were found to be inconsistent with the theoretical expectations. The fracture toughness was found to be significantly dependent on the effect of the WEDM on the material. The WEDM introduced a Heat Affected Zone (HAZ) on the surface of the pre-crack which modifies the fracture behavior of the material. It was concluded that WEDM is not a viable alternative to create a pre-crack in a compact tension specimen to perform fracture toughness testing of aluminum 7075-T6511.

Original language	English
Title of host publication	WCE 2015 - World Congress on Engineering 2015
Editors	S. I. Ao, Len Gelman, Len Gelman, David W.L. Hukins, Andrew Hunter, Alexander M. Korsunsky, S. I. Ao, S. I. Ao
Publisher	Newswood Limited
Pages	1038-1042
Number of pages	5
ISBN (Electronic)	9789881404701
Publication status	Published - 2015
Event	2015 World Congress on Engineering, WCE 2015 - London, United Kingdom Duration: 1 Jul 2015 → 3 Jul 2015

Publication series

Name	Lecture Notes in Engineering and Computer Science
Volume	2218
ISSN (Print)	2078-0958

Conference

Conference	2015 World Congress on Engineering, WCE 2015
Country/Territory	United Kingdom
City	London
Period	1/07/15 → 3/07/15

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure

Keywords

707S-T6s11 aluminum alloy
Compact tension specimen
EDM
Fracture toughness
Microstructure
Wire EDM

ASJC Scopus subject areas

Computer Science (miscellaneous)

Cite this

Madyira, Daniel M. / Effect of Wire EDM on microstructure and fracture toughness of 7075-T6511 aluminum alloy. WCE 2015 - World Congress on Engineering 2015. editor / S. I. Ao ; Len Gelman ; Len Gelman ; David W.L. Hukins ; Andrew Hunter ; Alexander M. Korsunsky ; S. I. Ao ; S. I. Ao. Newswood Limited, 2015. pp. 1038-1042 (Lecture Notes in Engineering and Computer Science).

@inproceedings{632d31a7d8304798bd2140abb116d874,

title = "Effect of Wire EDM on microstructure and fracture toughness of 7075-T6511 aluminum alloy",

abstract = "This paper reports on an investigation conducted to establish the influence of Wire Electrical Discharge Machining (WEDM) on the fracture toughness of aluminum 7075-T6511. The main objective was to determine if WEDM can be used to introduce a pre-crack into a compact tension specimen instead of the ASTM E-1820-11 specified fatigue pre-crack method. Fracture tests were conducted on four specimens which were pre-cracked using the WEDM technique. The rest of the fracture toughness evaluation followed the ASTM E-1820-11 guidelines. Results obtained from the experimental data were found to be inconsistent with the theoretical expectations. The fracture toughness was found to be significantly dependent on the effect of the WEDM on the material. The WEDM introduced a Heat Affected Zone (HAZ) on the surface of the pre-crack which modifies the fracture behavior of the material. It was concluded that WEDM is not a viable alternative to create a pre-crack in a compact tension specimen to perform fracture toughness testing of aluminum 7075-T6511.",

keywords = "707S-T6s11 aluminum alloy, Compact tension specimen, EDM, Fracture toughness, Microstructure, Wire EDM",

author = "Madyira, \{Daniel M.\}",

year = "2015",

language = "English",

series = "Lecture Notes in Engineering and Computer Science",

publisher = "Newswood Limited",

pages = "1038--1042",

editor = "Ao, \{S. I.\} and Len Gelman and Len Gelman and Hukins, \{David W.L.\} and Andrew Hunter and Korsunsky, \{Alexander M.\} and Ao, \{S. I.\} and Ao, \{S. I.\}",

booktitle = "WCE 2015 - World Congress on Engineering 2015",

note = "2015 World Congress on Engineering, WCE 2015 ; Conference date: 01-07-2015 Through 03-07-2015",

}

Madyira, DM 2015, Effect of Wire EDM on microstructure and fracture toughness of 7075-T6511 aluminum alloy. in SI Ao, L Gelman, L Gelman, DWL Hukins, A Hunter, AM Korsunsky, SI Ao & SI Ao (eds), WCE 2015 - World Congress on Engineering 2015. Lecture Notes in Engineering and Computer Science, vol. 2218, Newswood Limited, pp. 1038-1042, 2015 World Congress on Engineering, WCE 2015, London, United Kingdom, 1/07/15.

Effect of Wire EDM on microstructure and fracture toughness of 7075-T6511 aluminum alloy. / Madyira, Daniel M.
WCE 2015 - World Congress on Engineering 2015. ed. / S. I. Ao; Len Gelman; Len Gelman; David W.L. Hukins; Andrew Hunter; Alexander M. Korsunsky; S. I. Ao; S. I. Ao. Newswood Limited, 2015. p. 1038-1042 (Lecture Notes in Engineering and Computer Science; Vol. 2218).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Effect of Wire EDM on microstructure and fracture toughness of 7075-T6511 aluminum alloy

AU - Madyira, Daniel M.

PY - 2015

Y1 - 2015

N2 - This paper reports on an investigation conducted to establish the influence of Wire Electrical Discharge Machining (WEDM) on the fracture toughness of aluminum 7075-T6511. The main objective was to determine if WEDM can be used to introduce a pre-crack into a compact tension specimen instead of the ASTM E-1820-11 specified fatigue pre-crack method. Fracture tests were conducted on four specimens which were pre-cracked using the WEDM technique. The rest of the fracture toughness evaluation followed the ASTM E-1820-11 guidelines. Results obtained from the experimental data were found to be inconsistent with the theoretical expectations. The fracture toughness was found to be significantly dependent on the effect of the WEDM on the material. The WEDM introduced a Heat Affected Zone (HAZ) on the surface of the pre-crack which modifies the fracture behavior of the material. It was concluded that WEDM is not a viable alternative to create a pre-crack in a compact tension specimen to perform fracture toughness testing of aluminum 7075-T6511.

AB - This paper reports on an investigation conducted to establish the influence of Wire Electrical Discharge Machining (WEDM) on the fracture toughness of aluminum 7075-T6511. The main objective was to determine if WEDM can be used to introduce a pre-crack into a compact tension specimen instead of the ASTM E-1820-11 specified fatigue pre-crack method. Fracture tests were conducted on four specimens which were pre-cracked using the WEDM technique. The rest of the fracture toughness evaluation followed the ASTM E-1820-11 guidelines. Results obtained from the experimental data were found to be inconsistent with the theoretical expectations. The fracture toughness was found to be significantly dependent on the effect of the WEDM on the material. The WEDM introduced a Heat Affected Zone (HAZ) on the surface of the pre-crack which modifies the fracture behavior of the material. It was concluded that WEDM is not a viable alternative to create a pre-crack in a compact tension specimen to perform fracture toughness testing of aluminum 7075-T6511.

KW - 707S-T6s11 aluminum alloy

KW - Compact tension specimen

KW - EDM

KW - Fracture toughness

KW - Microstructure

KW - Wire EDM

UR - https://www.scopus.com/pages/publications/84991223628

M3 - Conference contribution

AN - SCOPUS:84991223628

T3 - Lecture Notes in Engineering and Computer Science

SP - 1038

EP - 1042

BT - WCE 2015 - World Congress on Engineering 2015

A2 - Ao, S. I.

A2 - Gelman, Len

A2 - Hukins, David W.L.

A2 - Hunter, Andrew

A2 - Korsunsky, Alexander M.

A2 - Ao, S. I.

PB - Newswood Limited

T2 - 2015 World Congress on Engineering, WCE 2015

Y2 - 1 July 2015 through 3 July 2015

ER -

Effect of Wire EDM on microstructure and fracture toughness of 7075-T6511 aluminum alloy

Abstract

Publication series

Conference

UN SDGs

Keywords

ASJC Scopus subject areas

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