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Strength at Pressure

  • November 08, 2017
  • Blue Corn Cafe, 133 Water St.
  • Santa Fe , NM , USA

Description

Dr. Ellen Cerreta, M-DO, ASM Board of Trustees, ASM Fellow

Deputy Division Leader for The Explosive Science and Shock Physics Division

Los Alamos National Laboratory

 

TOPIC: Under conditions of static and dynamic loading to high pressures or stresses, it can be critical to quantify the strength of a material and it is well understood that material microstructure controls properties like strength. It is also expected that microstructures, particularly for many important structural metals like iron and titanium, are evolved or modified in significant ways when subjected to high stresses. These modifications include microstructural refinement due to twinning, significant storage of plastic work within grains, and even phase change. Therefore, it follows that the strength of the material under stress is dependent on the microstructure evolved under stress. This is problematic, as until recently the materials science and physics communities have been limited to post mortem interrogation of materials exposed to high stresses and little is quantified about the actual microstructures under load. Current predictive capabilities for strength under high stress utilize the known microstructures prior to loading and under moderate stress conditions. Post mortem investigations of material subjected to extremes of stress indicate that this may be problematic. Here, recent work on titanium and zirconium metals that includes the use of current light sources, such as the Advanced Photon Source at Argonne National Laboratory, will be presented to discuss quantification of structure at high stresses. This will be related to on-going efforts at Los Alamos National Laboratory to develop phase-aware, predictive modeling capabilities for material strength at pressure.

SPEAKER: Ellen Cerreta is currently the Deputy Division Leader for The Explosive Science and Shock Physics Division, at Los Alamos National Laboratory. She joined the ASM Board of Trustees in October of 2015 and was awarded ASM Fellow in 2016.

 

DATE/TIME: Wednesday, November 08, 2017  Gather for Social at 6:00PM, dinner is at 6:30PM, and the speaker is at 7:15PM

COST: $10 for members and guests, $20 non-members, $5 for students

LOCATION: Blue Corn Café, 133 Water St. Santa Fe, NM 87501

RSVP: Space is limited please RSVP here: http://tinyurl.com/jointASMmeeting by 5pm on Monday, November 6th

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