About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Response of Materials Investigated Through Novel In-Situ Experiments and Modeling
|
| Presentation Title |
High Temperature Profilometry-Based Indentation Plastometry (HT-PIP) – Influence of Creep on Experimental Outcomes |
| Author(s) |
James R. Miller, Philip John McKeown, Chizhou Fang, Bill Clyne |
| On-Site Speaker (Planned) |
James R. Miller |
| Abstract Scope |
Profilometry-based Indentation Plastometry (PIP) gives stress-strain curves via automated indentation. The machine comprises loading frame, profilometer and control software (implementing iterative FEM simulation of the test). This paper concerns use of a heating stage (plus software controlling thermal conditions) with an 800˚C capability. For some metals, there is good agreement between stress-strain curves from PIP and from tensile testing, with neither affected by test timescale. However, for others (particularly at higher temperatures), creep affects outcomes, so stress-strain curves from both tests depend on timescale - with neither giving a genuine (‘purely plastic’) relationship. Furthermore, the two tests are affected differently, so there is no reliable agreement between the two curves. This has been investigated for several alloys and a procedure devised that reveals (during a standard PIP test) whether the case (material and temperature) concerned is one for which creep is significantly affecting the outcome. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, High-Temperature Materials, Characterization |