TY - JOUR

T1 - Development and application of a heated in-situ SEM micro-testing device

AU - Fritz, R.

AU - Kiener, D.

PY - 2017/11/1

Y1 - 2017/11/1

N2 - Understanding temperature-dependent deformation behaviour of small material volumes is a key issue in material science, especially the deformation behaviour of bcc metals at elevated temperatures is of particular interest for small-scale structural applications. Therefore, a custom-built heating device consisting of independently resistive-heated sample and indenter, and adaptable to existing micro-indenters, is presented. Key parameters of material selection, design of components and temperature control are outlined. Testing temperatures ranging from room temperature up to ∼300 °C are reached with low drift and without active cooling. To demonstrate the functionality, a variety of in-situ SEM micromechanical experiments were conducted at room temperature and 230 °C, respectively. Examples of micro-pillar compression on single crystalline and ultrafine-grained Chromium, as well as notched cantilever fracture experiments on ultrafine-grained Chromium show assets of this powerful tool, allowing more detailed insights into temperature-dependent deformation and fracture behaviour.

AB - Understanding temperature-dependent deformation behaviour of small material volumes is a key issue in material science, especially the deformation behaviour of bcc metals at elevated temperatures is of particular interest for small-scale structural applications. Therefore, a custom-built heating device consisting of independently resistive-heated sample and indenter, and adaptable to existing micro-indenters, is presented. Key parameters of material selection, design of components and temperature control are outlined. Testing temperatures ranging from room temperature up to ∼300 °C are reached with low drift and without active cooling. To demonstrate the functionality, a variety of in-situ SEM micromechanical experiments were conducted at room temperature and 230 °C, respectively. Examples of micro-pillar compression on single crystalline and ultrafine-grained Chromium, as well as notched cantilever fracture experiments on ultrafine-grained Chromium show assets of this powerful tool, allowing more detailed insights into temperature-dependent deformation and fracture behaviour.

KW - Elevated temperature

KW - Fracture toughness

KW - In-situ testing

KW - Micromechanics

KW - Ultrafine-grained microstructure

UR - http://www.scopus.com/inward/record.url?scp=85024499193&partnerID=8YFLogxK

U2 - 10.1016/j.measurement.2017.07.012

DO - 10.1016/j.measurement.2017.07.012

M3 - Article

AN - SCOPUS:85024499193

VL - 110.2017

SP - 356

EP - 366

JO - Measurement

JF - Measurement

SN - 0263-2241

IS - November

ER -