Impression Creep of Lightweight Alloys

Paper #:
  • 2010-01-0226

Published:
  • 2010-04-12
Citation:
Chen, R., Yang, F., and Lu, Y., "Impression Creep of Lightweight Alloys," SAE Int. J. Mater. Manuf. 3(1):120-124, 2010, https://doi.org/10.4271/2010-01-0226.
Pages:
5
Abstract:
Conventional creep testing requires many samples and therefore is time consuming and inconvenient. The impression creep technique is a new creep test wherein a cylindrical, flat-tipped punch is pressed into the material and the displacement recorded as a function of time. Due to the constant contact area between the punch and specimen, a steady-state deformation can be reached underneath the punch, from which the creep parameters can be obtained. In the present study, the creep behaviors of two lightweight magnesium alloys were studied by using impression creep tests in the temperature range of 408-443K and under the punching stress range of 1.68-60.4 MPa. Using a power law between the steady-state impression velocity and the punching stress, it was found that the stress exponent changes with both stress and temperature. In the high temperature range, the stress exponent n for MRI 230 is ~ 6.7 while for AZ91D is ~ 5.5. The activation energy for MRI 230 is 78.9 kJ/mol and for AZ91D is 59.5 kJ/mol.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$28.00
Mail
$28.00
Members save up to 42% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Training / Education
2017-10-31
Video
2017-03-26
Book
2006-12-05
Book
2012-11-01
Event
2018-04-10
Training / Education
2017-10-23
Training / Education
2017-10-19