On-Demand Session: Nanoindentation at Elevated Temperature and Humidity

       _{PRESENTATION HIGHLIGHTS:}

• [00:00:21] Why and when to test at elevated temperature and humidity

• [00:01:09] Introduction to Bruker’s Hysitron TI 980 TriboIndenter and TI 980 GB

• [00:02:16] Introduction to the xSol Heating, Cooling, & Humidity Stage

• [00:04:17] Real-time demo: testing samples at high humidity levels with the Hysitron TI 980 TriboIndenter

• [00:13:51] Observing the sample inside the xSol-stage
  

       _{PRESENTATION HIGHLIGHTS:}

• [00:00:00] Introduction to speaker and research

• [00:04:54] Why to study the mechanics of biological systems in environmental conditions

• [00:09:32] Environmental control system design

• [00:11:28] What in-situ nanoindentation can teach us about biological materials

• [00:14:19] Technical setup for in-situ nanoindentation under elevated humidities

• [00:17:46] Case study: In-situ nanoindentation on spruce wood

• [00:18:51] Case study: In-situ nanoindentation on diatom cells (C. australis)

• [00:20:34] Case study: In-situ nanoindentation on pine tree needles
  

       _QUESTIONS:

• [00:00:08] Is the humidity dependence a problem when thinking about producing parts for biomimetic materials?

• [00:01:25] We see that materials found in nature are very dependent on humidity. It almost feels as if we must be overlooking humidity dependence in our artificial materials. Which technological materials should we look at first?

• [00:02:40] Does the area function change with humidity?

• [00:03:08] Is there a big difference in mechanical properties between samples tested fully immersed in liquid and those partially hydrated by humid air?

• [00:04:32] For nanoindentation at high temperature and humidity, are creep and relaxation experiments possible? If yes, what kind of strain-rate can be achieved and how is contact thermal drift managed?

• [00:07:40] Can we use this instrument to characterize graphene?