Critical stress intensity factor determination for AZ61 magnesium alloy

M. A M Daud, Zainuddin Sajuri, Mohd. Zaidi Omar, J. Syarif

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A stress intensity factor K was used as a fracture parameter to determine the plane strain fracture toughness KIC of AZ61 magnesium alloy using a single edge notch bend (SENB) specimen in accordance to ASTM E399 testing method. Five different specimen thicknesses of 2 to 10 mm were used in the test. A sharp fatigue pre-crack was initiated and propagated to half of specimen width at a constant crack propagation rate of about 1 × 10-8 m/cycle before the specimen was loaded in tension until the fracture stress is reached and then rapid fracture occurred. The fracture toughness KC values obtained for different thicknesses showed that KC value decreased with increasing specimen thickness. The highest KC value obtained was 16.5 MPa√m for 2 mm thickness specimen. The value of K C became relatively constant at about 13 MPa√m when the specimen thickness exceeds 8 mm. This value was then considered as the plane strain fracture toughness KIC of AZ61 magnesium alloy. Calculation of the minimum thickness requirement for plane strain condition and the size of the shear lips of the fracture surface validate the obtained KIC value.

Original languageEnglish
Title of host publicationKey Engineering Materials
Pages1121-1126
Number of pages6
Volume462-463
DOIs
Publication statusPublished - 2011
Event8th International Conference on Fracture and Strength of Solids 2010, FEOFS2010 - Kuala Lumpur
Duration: 7 Jun 20109 Jun 2010

Publication series

NameKey Engineering Materials
Volume462-463
ISSN (Print)10139826

Other

Other8th International Conference on Fracture and Strength of Solids 2010, FEOFS2010
CityKuala Lumpur
Period7/6/109/6/10

Fingerprint

Magnesium alloys
Stress intensity factors
Fracture toughness
Crack propagation
Fatigue of materials
Cracks
Testing

Keywords

  • Fracture toughness
  • Magnesium alloy
  • Shear lips
  • Stress intensity factor
  • Thickness

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Daud, M. A. M., Sajuri, Z., Omar, M. Z., & Syarif, J. (2011). Critical stress intensity factor determination for AZ61 magnesium alloy. In Key Engineering Materials (Vol. 462-463, pp. 1121-1126). (Key Engineering Materials; Vol. 462-463). https://doi.org/10.4028/www.scientific.net/KEM.462-463.1121

Critical stress intensity factor determination for AZ61 magnesium alloy. / Daud, M. A M; Sajuri, Zainuddin; Omar, Mohd. Zaidi; Syarif, J.

Key Engineering Materials. Vol. 462-463 2011. p. 1121-1126 (Key Engineering Materials; Vol. 462-463).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Daud, MAM, Sajuri, Z, Omar, MZ & Syarif, J 2011, Critical stress intensity factor determination for AZ61 magnesium alloy. in Key Engineering Materials. vol. 462-463, Key Engineering Materials, vol. 462-463, pp. 1121-1126, 8th International Conference on Fracture and Strength of Solids 2010, FEOFS2010, Kuala Lumpur, 7/6/10. https://doi.org/10.4028/www.scientific.net/KEM.462-463.1121
Daud MAM, Sajuri Z, Omar MZ, Syarif J. Critical stress intensity factor determination for AZ61 magnesium alloy. In Key Engineering Materials. Vol. 462-463. 2011. p. 1121-1126. (Key Engineering Materials). https://doi.org/10.4028/www.scientific.net/KEM.462-463.1121
Daud, M. A M ; Sajuri, Zainuddin ; Omar, Mohd. Zaidi ; Syarif, J. / Critical stress intensity factor determination for AZ61 magnesium alloy. Key Engineering Materials. Vol. 462-463 2011. pp. 1121-1126 (Key Engineering Materials).
@inproceedings{d660ab3c2f70448c83b49fb87ac082cf,
title = "Critical stress intensity factor determination for AZ61 magnesium alloy",
abstract = "A stress intensity factor K was used as a fracture parameter to determine the plane strain fracture toughness KIC of AZ61 magnesium alloy using a single edge notch bend (SENB) specimen in accordance to ASTM E399 testing method. Five different specimen thicknesses of 2 to 10 mm were used in the test. A sharp fatigue pre-crack was initiated and propagated to half of specimen width at a constant crack propagation rate of about 1 × 10-8 m/cycle before the specimen was loaded in tension until the fracture stress is reached and then rapid fracture occurred. The fracture toughness KC values obtained for different thicknesses showed that KC value decreased with increasing specimen thickness. The highest KC value obtained was 16.5 MPa√m for 2 mm thickness specimen. The value of K C became relatively constant at about 13 MPa√m when the specimen thickness exceeds 8 mm. This value was then considered as the plane strain fracture toughness KIC of AZ61 magnesium alloy. Calculation of the minimum thickness requirement for plane strain condition and the size of the shear lips of the fracture surface validate the obtained KIC value.",
keywords = "Fracture toughness, Magnesium alloy, Shear lips, Stress intensity factor, Thickness",
author = "Daud, {M. A M} and Zainuddin Sajuri and Omar, {Mohd. Zaidi} and J. Syarif",
year = "2011",
doi = "10.4028/www.scientific.net/KEM.462-463.1121",
language = "English",
isbn = "9780878492107",
volume = "462-463",
series = "Key Engineering Materials",
pages = "1121--1126",
booktitle = "Key Engineering Materials",

}

TY - GEN

T1 - Critical stress intensity factor determination for AZ61 magnesium alloy

AU - Daud, M. A M

AU - Sajuri, Zainuddin

AU - Omar, Mohd. Zaidi

AU - Syarif, J.

PY - 2011

Y1 - 2011

N2 - A stress intensity factor K was used as a fracture parameter to determine the plane strain fracture toughness KIC of AZ61 magnesium alloy using a single edge notch bend (SENB) specimen in accordance to ASTM E399 testing method. Five different specimen thicknesses of 2 to 10 mm were used in the test. A sharp fatigue pre-crack was initiated and propagated to half of specimen width at a constant crack propagation rate of about 1 × 10-8 m/cycle before the specimen was loaded in tension until the fracture stress is reached and then rapid fracture occurred. The fracture toughness KC values obtained for different thicknesses showed that KC value decreased with increasing specimen thickness. The highest KC value obtained was 16.5 MPa√m for 2 mm thickness specimen. The value of K C became relatively constant at about 13 MPa√m when the specimen thickness exceeds 8 mm. This value was then considered as the plane strain fracture toughness KIC of AZ61 magnesium alloy. Calculation of the minimum thickness requirement for plane strain condition and the size of the shear lips of the fracture surface validate the obtained KIC value.

AB - A stress intensity factor K was used as a fracture parameter to determine the plane strain fracture toughness KIC of AZ61 magnesium alloy using a single edge notch bend (SENB) specimen in accordance to ASTM E399 testing method. Five different specimen thicknesses of 2 to 10 mm were used in the test. A sharp fatigue pre-crack was initiated and propagated to half of specimen width at a constant crack propagation rate of about 1 × 10-8 m/cycle before the specimen was loaded in tension until the fracture stress is reached and then rapid fracture occurred. The fracture toughness KC values obtained for different thicknesses showed that KC value decreased with increasing specimen thickness. The highest KC value obtained was 16.5 MPa√m for 2 mm thickness specimen. The value of K C became relatively constant at about 13 MPa√m when the specimen thickness exceeds 8 mm. This value was then considered as the plane strain fracture toughness KIC of AZ61 magnesium alloy. Calculation of the minimum thickness requirement for plane strain condition and the size of the shear lips of the fracture surface validate the obtained KIC value.

KW - Fracture toughness

KW - Magnesium alloy

KW - Shear lips

KW - Stress intensity factor

KW - Thickness

UR - http://www.scopus.com/inward/record.url?scp=79551504526&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79551504526&partnerID=8YFLogxK

U2 - 10.4028/www.scientific.net/KEM.462-463.1121

DO - 10.4028/www.scientific.net/KEM.462-463.1121

M3 - Conference contribution

SN - 9780878492107

VL - 462-463

T3 - Key Engineering Materials

SP - 1121

EP - 1126

BT - Key Engineering Materials

ER -