Skip to main content Accessibility help

We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.

Close cookie message
×
  1. Home
  2. Journals
  3. MRS Bulletin
  4. Volume 24
MRS Bulletin
Refine listing

Refine listing

Access:
Publication date:
Topic: Show more

Actions for selected content:

Select all | Deselect all
  • View selected items
  • Export citations
  • Download PDF (zip)
  • Save to Kindle
  • Save to Dropbox
  • Save to Google Drive

Save Search

You can save your searches here and later view and run them again in "My saved searches".

Please provide a title, maximum of 40 characters.
Cancel
×
< Back to all issues

Volume 24 - December 1999

Contents

Page 9 of 13

MRS News

  • MRS Elects Officers, Councillors for 2000

  • Published online by Cambridge University Press:
    29 November 2013, pp. 64-66
    • Article
      • You have access
    • PDF
    • Export citation

International Union of Materials Research Societies

  • MRS-I Features Building Materials at 10th Annual General Meeting

  • Published online by Cambridge University Press:
    29 November 2013, p. 60
    • Article
      • You have access
    • PDF
    • Export citation

  • IUMRS-ICAM'99 Presents Symposia and Forums on Advanced Materials

  • Published online by Cambridge University Press:
    29 November 2013, pp. 62-63
    • Article
      • You have access
    • PDF
    • Export citation

Profiles & Perspectives

  • Sizing Up the Fermi Surface: Brian Pippard Speaks of Metals, Methods, and Songs

  • Published online by Cambridge University Press:
    29 November 2013, pp. 50-53
    • Article
      • You have access
    • PDF
    • Export citation

Abstracts

  • What's New With JMR

  • Published online by Cambridge University Press:
    29 November 2013, p. 52
    • Article
      • You have access
    • PDF
    • Export citation

MRS News

  • MRS Spring 1999 Meeting Features Soft, Magnetic, and Display Materials, Among Other Interdisciplinary Research Topics

  • Published online by Cambridge University Press:
    29 November 2013, pp. 50-65
    • Article
      • You have access
    • PDF
    • Export citation

Mechanical Behavior of Nanostructured Materials

  • Ductility of Nanostructured Materials

  • C.C. Koch, D.G. Morris, K. Lu, A. Inoue
  • Published online by Cambridge University Press:
    29 November 2013, pp. 54-58

  • Ductility is defined as the ability of a material to change shape without fracture. It is of critical importance for engineering materials for both manufacturability and Performance. Measures of ductility include percent elongation (uniform plastic flow prior to mechanical instability—necking—or fracture) and percent reduction in area. Fracture toughness is also some measure of potential ductility. Engineering materials exhibit wide variations in ductility which can often limit their application.

    Ductility is a property of nanocrystalline materials which might be predicted to be enhanced by extrapolation of its grain-size dependence in conventional polycrystalline materials. It has been predicted that extrapolation of the grain size, or the scale of the microstructure, to the nanoscale will lead to both strengthening and an increase in ductility. As far as failure and ductility are concerned, this idea is based on experience with conventional materials, where the yield and fracture stress show different dependencies on the grain size. The fracture stress typically increases faster than the yield stress with decreasing grain size such that ductile/brittle transitions can occur. For example, the ductile / brittle transition temperature in mild steel can be lowered about 40°C by reducing the grain size by a factor of five. In terms of how ductility may be affected by the extreme grainsize reduction to the nanoscale, we consider the following. Firstly, it may be recalled that obtaining ductility relies simply on plastic deformation occurring without the catastrophic onset of failure mechanisms, and therefore we can examine possibilities of changing ductility in terms of avoiding failure.

Education Exchange

  • “Bring a Kid to Lab Day” Features Slime Creatures and a Shape Memory Alloy

  • Jane Slezak
  • Published online by Cambridge University Press:
    29 November 2013, p. 51
    • Article
      • You have access
    • PDF
    • Export citation

MRS News

  • Balazs, Hwang, Jones, and Ross to Chair MRS Spring 2000 Meeting

  • Published online by Cambridge University Press:
    29 November 2013, pp. 61-62
    • Article
      • You have access
    • PDF
    • Export citation

News

  • Classified

  • Published online by Cambridge University Press:
    29 November 2013, pp. 53-55
    • Article
      • You have access
    • PDF
    • Export citation

Other

  • Advertisers in This Issue

  • Published online by Cambridge University Press:
    29 November 2013, p. 66
    • Article
      • You have access
    • PDF
    • Export citation

MRS News

  • Gibala Leads Executive Committee in 1999

  • Published online by Cambridge University Press:
    29 November 2013, pp. 56-58
    • Article
      • You have access
    • PDF
    • Export citation

  • MRS Seeks Nominees for Outstanding Young Investigator Award, 2000

  • Published online by Cambridge University Press:
    29 November 2013, pp. 61-63
    • Article
      • You have access
    • PDF
    • Export citation

News

  • Classified

  • Published online by Cambridge University Press:
    29 November 2013, pp. 77-79
    • Article
      • You have access
    • PDF
    • Export citation

MRS News

  • MRS Featured Volunteer

  • Published online by Cambridge University Press:
    29 November 2013, p. 64
    • Article
      • You have access
    • PDF
    • Export citation

  • Plenary Speaker Gargini to Address Materials and the Semiconductor Industry

  • Published online by Cambridge University Press:
    29 November 2013, p. 81
    • Article
      • You have access
    • PDF
    • Export citation

Historical Note

  • Amontons' Rules of Friction Formulated 300 Years Ago

  • Irwin L. Singer
  • Published online by Cambridge University Press:
    29 November 2013, p. 52
    • Article
      • You have access
    • PDF
    • Export citation

MRS News

  • Preview: 1999 MRS Spring Meeting

  • Published online by Cambridge University Press:
    29 November 2013, pp. 59-71
    • Article
      • You have access
    • PDF
    • Export citation

Abstracts

  • Abstracts for September 1999 Journal of Materials Research

  • Published online by Cambridge University Press:
    29 November 2013, pp. 54-61
    • Article
      • You have access
    • PDF
    • Export citation

  • Abstracts for August 1999 Journal of Materials Research

  • Published online by Cambridge University Press:
    29 November 2013, pp. 66-73
    • Article
      • You have access
    • PDF
    • Export citation

Page 9 of 13