*
Bookmark and Share

Materials Performance Group

Welcome

The Materials Performance Group

  • develops new and improved models, test methods and standards to accurately measure mechanical properties of advanced materials, such as high strength steel and aluminum alloys, as well as of conventional materials under both expected and extreme environmental conditions;
  • generates and disseminates reliable mechanical property data;
  • standardizes, both nationally and internationally, mechanical property test methods.

Foecke_Portrait_1

Timothy Foecke,
Group Leader
Group Competence
  • Mechanical testing at high temperature and high strain rate
  • Sheet metal forming
  • X-ray stress measurements
  • Standard reference materials
  • Hardness measurements and standards
  • Hydrogen embrittlement
  • Stress-corrosion cracking
  • Finite-element analysis
  • Plasticity theory
  • Atomistic modeling
  • Shape Memory Alloys

Programs/Projects

Hardness Standardization—Our objective is to standardize and improve hardness measurement both in the U.S. and internationally. NIST is the U.S. National Metrology Institute (NMI) for hardness, and as such, is responsible …

Marciniak Mechanical Testing—A novel method for measuring multiaxial stress-strain curves in sheet metal has been designed based on a modified Marciniak punch stretching geometry.  Since the sheet sample is being …

Cruciform Multiaxial Testing—The cruciform mechanical test is widely used to measure the multiaxial deformation behavior of materials.  Standardization of this technique would have widespread technical benefits, and …

NIST Center for Automotive Lightweighting—Our objective is to develop the measurement methodology, standards and analysis necessary for the US auto industry and base metal suppliers to transition from a strain-based to a stress-based …

Yield Surface Measurement—In order to calculate the stresses that develop within a formed part, and thereby compensate for such things as elastic springback, it is necessary for the modeler to be able to relate an …

Crystal Plasticity Modeling—Crystal Plasticity Modeling calculates multiaxial mechanical constitutive behavior by treating the sample as an interacting aggregate of single crystals that interact at their boundaries.  …

Surface Roughness—Surface roughness summary pending

Materials Codes and Standards for Hydrogen Distribution—The goal of this project is to enable the development of a scientific and technical infrastructure for the safe and efficient use of hydrogen as a fuel source. For example, figure 1 shows the …

Mechanical Performance - Extreme Conditions—This project provides property data, metrology, and standard test methods for materials systems under extreme conditions for areas critical to US manufacturing, homeland security, and energy …

Physical Infrastructure: Connections—Using a complementary approach of experimental measurements and detailed finite element analysis, we will develop more realistic yet computationally efficient global models incorporating bridge …

Fundamentals of Deformation—This project provides new measurement methods, property data and simulations for areas critical to US manufacturing, describing the mechanisms responsible for mechanical behavior. The mechanical …