Materials Science 995.02
Call no.  12392-4
One graded credit
Meets Wednesday 4:30-5:18     FL 142

Theme: Scale Effects in Mechanical Behavior  or  Strength of Nanostuff

Plan: Each week 3 students will present on related sub-themes within the theme of scale effects in materials an/or nanomaterials.  Each presentation should be 10-15 minutes in length.  They should be planned so as to be clear to the group and informative.  All presentations will be prepared in PowerPoint format and a computer and projector will be available for the presentations (no need to make transparancies).  These presentations will be provided to the instructor eiher on disk or via e-mail ( Daehn.1@osu.edu ) and they will then be made available to all on the web.  I can also make papers available in the coffee room upon request.

Also, note in order to get 795 credit, you must fully participate in a 995 seminar.
 
 

Topics and Assignments

1) - March 29th -  Introduction & organization
(students are assigned to topics and presentation guidelines)

2) - April 5th - The Hall-Petch relation
Where it comes from (theory)  - Paul Brenner Paul's Presentation
Recent modifications to the theory  - Sassan Shademan  Sassan's Presentation
Comparisons to data  -  Ashish Kapoor  Ashish's Presentation

3) April 12 - Processing of nanocrystalline materials
Bulk polycrystals by plastic working  - Jue Wang   Jue's Presentation
Bulk polycrystals by powder consolidation  -  Mala Seth Mala's Presentation
Layered structure processing  -  Shiling Ruan  Shiling's Presentation

4) April 19th -- Structure of nanocrystalline materials
Structure of polycrystals  - Amit S.   Amit's Presentation

5) April 26th - Testing mechanical properties at short length scales
Indentation methods (micro to nano)  - Satyarth Suri   -hand drawn slides
Survey of indentation data (does hardness depend on indent depth?) - Jeff Wang
Other test methods; Microtensile testing - Joe Tatalovitch

6)  May 3d - Strain gradient effects
 Origins of the effect  - Xiyong Fu
 Modeling the effect  - Suchi
 Comparing models to data - OPEN

7) May 10th - Component scale effects
Studies in silicon based MEMS - Kunal
Effects on plastic flow - Karthik Viswanathan
Effects on fracture and fatigue - Guangbin  Guangbin's Presentation

8) May 17th - Current studies on microstructural scale effects at lowhomologoustemperatures
Plastic flow in metallic polycrystals  -  Weidong Wu
Plastic flow in metallic multilayers - Peihui Zhang
Fracture in ultra fine-grained materials - Russ Blume

9)  May 24th - Current studies on scale effects at high homologous temperature
Theory of superplasticity in ultrafine grained materials - Mark Carroll Mark's Presentation
Observatons of plastic flow in ultrafine grained materials at high temperature - Grant Pollard
Theory of high strength, high temperature materials - OPEN

10) May 31st  -  Special topics and/or discussion
I’m open to your suggestions on what I missed…
Talks can be scheduled here if needed!
Please bring one short question, discussion item, suggestion or controversial issue for discussion!!

Feel free to write me with questions.

P. S. I hope to get all the presentations up soon, but PowerPoint is not cooperating with me!! Stay tuned.