TY - CHAP

T1 - Low cycle fatigue properties of extruded Mg10GdxNd alloys

AU - Tober, Gerhard

AU - Maier, Petra

AU - Müller, Soren

AU - Hort, Norbert

N1 - Conference code: 143

PY - 2014/2

Y1 - 2014/2

N2 - The Rare Earth (RE) containing magnesium alloys MglOGd and MglOGdlNd show after extrusion very good low cycle fatigue (LCF) properties. Considering extruded AZ31 as a possible benchmark alloy, life times as a function of LCF stress values are similar to the alloys investigated in this study. Mechanical properties determined in tension and compression show smaller values for both RE containing alloys. Therefore the LCF behavior is analyzed by the stress-strain hysteresis evaluation resulting in cyclic creep and plastic hardening or softening. LCF tests were strain controlled with amplitude of 0.5 % and 0.8 % at a frequency of 5 Hz. The fracture surfaces are examined by SEM, where the area of crack propagation and overload were of main interest. Micrographs of longitudinal cross sections reveal twinning along the region of crack propagation. The correlation between the amount of twins and the number of cycles is discussed.

AB - The Rare Earth (RE) containing magnesium alloys MglOGd and MglOGdlNd show after extrusion very good low cycle fatigue (LCF) properties. Considering extruded AZ31 as a possible benchmark alloy, life times as a function of LCF stress values are similar to the alloys investigated in this study. Mechanical properties determined in tension and compression show smaller values for both RE containing alloys. Therefore the LCF behavior is analyzed by the stress-strain hysteresis evaluation resulting in cyclic creep and plastic hardening or softening. LCF tests were strain controlled with amplitude of 0.5 % and 0.8 % at a frequency of 5 Hz. The fracture surfaces are examined by SEM, where the area of crack propagation and overload were of main interest. Micrographs of longitudinal cross sections reveal twinning along the region of crack propagation. The correlation between the amount of twins and the number of cycles is discussed.

KW - Extruded

KW - Low cycle fatigue

KW - Magnesium alloy

KW - Rare Earth

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=84899788081&partnerID=8YFLogxK

U2 - 10.1002/9781118888179.ch25

DO - 10.1002/9781118888179.ch25

M3 - Article in conference proceedings

AN - SCOPUS:84899788081

SN - 9781118888162

T3 - Magnesium Technology

SP - 115

EP - 120

BT - Magnesium Technology 2014 - Held During TMS 2014 143rd Annual Meeting and Exhibition

A2 - Alderman, Martyn

A2 - Manuel, Michele V.

A2 - Hort, Nobert

A2 - Neelameggham, Neale R.

PB - The Minerals, Metals & Materials Society

T2 - 143rd Annual Meeting and Exhibition of Magnesium Technology 2014 - TMS 2014

Y2 - 16 February 2014 through 20 February 2014

ER -