Skip to main content Accessibility help
×
Hostname: page-component-7c8c6479df-7qhmt Total loading time: 0 Render date: 2024-03-29T14:16:54.149Z Has data issue: false hasContentIssue false

8 - Flow Stress Data

Published online by Cambridge University Press:  05 June 2012

Henry S. Valberg
Affiliation:
Norwegian University of Science and Technology, Trondheim
Get access

Summary

The flow stress of a material is indeed an important parameter in metal forming. To create a good FEM model of a forming process, for example, it is required that one be able to specify the flow stress of the workpiece material with good accuracy.

Because of this, the main processing parameters affecting the flow stress of commonly used metals and their alloys will be considered in this chapter, as regards both cold and hot forming applications. When the flow stress has been measured, so one knows how the processing parameters affect the flow stress, it is common to search for an equation that can describe the actual flow stress dependence well. When one has arrived at such an equation, one says that one has obtained a good material model for the material. It is also common to call the material model the constitutive equation for the actual metal. Commonly applied procedures to determine constitutive equations for metals will be described and material models for some commonly used metals will be reviewed in this chapter.

The Flow Stress

In Fig. 7.8(b), flow stress curves were shown as they commonly appear for a metal at room temperature. As depicted in this figure, the true flow stress often increases with increasing strain when the metal is tested at room temperature.

If we consider metals, at cold, warm, and hot forming temperatures, a number of parameters can affect flow stress, not only strain.

Type
Chapter
Information
Applied Metal Forming
Including FEM Analysis
, pp. 115 - 126
Publisher: Cambridge University Press
Print publication year: 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Altan, T., Oh, S.-I., and Gegel, H. L.: “Metal forming, fundamentals and applications,” ASM Int., 1983, pp. 45–73.
Boyer, E. H. (Ed.): “Atlas of stress-strain curves,” 2nd ed., ASM Int., Metals Park, Ohio, 2002.

Save book to Kindle

To save this book to your Kindle, first ensure coreplatform@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

  • Flow Stress Data
  • Henry S. Valberg, Norwegian University of Science and Technology, Trondheim
  • Book: Applied Metal Forming
  • Online publication: 05 June 2012
  • Chapter DOI: https://doi.org/10.1017/CBO9780511801907.010
Available formats
×

Save book to Dropbox

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.

  • Flow Stress Data
  • Henry S. Valberg, Norwegian University of Science and Technology, Trondheim
  • Book: Applied Metal Forming
  • Online publication: 05 June 2012
  • Chapter DOI: https://doi.org/10.1017/CBO9780511801907.010
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Flow Stress Data
  • Henry S. Valberg, Norwegian University of Science and Technology, Trondheim
  • Book: Applied Metal Forming
  • Online publication: 05 June 2012
  • Chapter DOI: https://doi.org/10.1017/CBO9780511801907.010
Available formats
×