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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Fracture Properties and Residual Stresses in Small Dimensions
Presentation Title Improved Fracture Resistance of Brittle Molybdenum Thin Films on Polyimide with Stress Tailoring
Author(s) Megan Cordill, Tanja Jörg, Oleksandr Glushko, Robert Franz, Jörg Winkler, Christian Mitterer
On-Site Speaker (Planned) Megan Cordill
Abstract Scope Molybdenum has emerged as the material of choice for electronic applications due to its high thermal stability, chemical inertness, and low electrical resistance. Recently attention has been focused on the fracture behavior of these brittle thin films on polymers and their utilization in flexible electronics. This study reports on magnetron sputter deposited molybdenum films on polyimide substrates and how the residual stress of the thin films can be tailored to control the electro-mechanical behavior. In-situ characterization techniques were used to examine the mechanical and electrical response of the films during straining. Tensile tests were performed with in-situ resistance and x-ray diffraction measurements to determine the fracture strain of the films, while the crack evolution during straining was investigated with optical microscopy. In general, a high compressive stress state enabled the Mo films to withstand much higher tensile strains before the loss of conductivity and severe cracking occurred.
Proceedings Inclusion? Undecided


Atomistic Simulations of Crack Nucleation and Propagation along Grain Boundaries
Brittle-to-ductile Transition of Quasicrystals at Small Scales: Cracking, Serrated flows, Diffusion and Phase Transformation
Constitutive Modeling of Indentation Cracking in Fused Silica
Coupling Discrete Dislocation Plasticity and Cohesive Zone Models
Critical Stresses in Intermittent Plasticity
Directional Dependency of the Fracture Behavior of High Strength Pearlitic Steel Wires
Enhanced Fracture Toughness of Mg/Nb Laminated Composites
Enhancing Ductility of Metal-Metal (BCC-HCP) and Metal-Ceramic Multilayered Nanocomposites
Extraordinary Stability of Clamped Beam Fracture Toughness Specimen: Stress Intensity Factor Solutions and New Insights on Possibilities at Small Dimensions
Fracture Toughness of Beryllium Using Insitu X-ray and Digital Image Correlation Techniques
High Temperature Mechanical Properties of Materials Synthesized from Graphene and Carbon Nanotubes
Improved Fracture Resistance of Brittle Molybdenum Thin Films on Polyimide with Stress Tailoring
In Situ Micron Scale Fracture Toughness Testing and Modeling of a Chevron Notched Bowtie-shaped Beam
In Situ Stable Crack Growth at the Micron Scale
In Situ Stable Fracture of Sapphire-Niobium Interfaces
Indentation Fracture Experiments on Single Crystal Olivine from 300K to 1100K
Liquid Metal Embrittlement at the Micro-scale: Gallium FIB vs. Xenon FIB
Measurement of the Fracture Toughness of Thin Films by Pillar Splitting: Effect of Materials Structure and Indenter Geometry
Micro-Compression Testing of Mg-Nb Multilayered Nano-Composites for Ultra-High Strength, Formability and Ductility
Nanoscale Strain Mapping of Individual Defects during In Situ Deformation
Orientation Dependent Fracture Behaviour of LiTaO3 and LiNbO3 Single Crystals
Oxide-induced Substrate Cracking in Ti and Stainless Steels Driven by Pulsed Laser Irradiation
SEM-based In-situ Fracture Measurements of Ceramics and Metals
Small-scale Testing Methodology to Study Fracture Toughness of Interfaces in Multilayered Systems
Studying Plasticity during Fracture at the Micron Scale by Means of Cantilever Experiments in Single-crystalline NiAl and W – HR-EBSD Analyses and Elevated Temperature Measurements
Temperature-Dependent Delamination Failure of Metal-Ceramic Interfaces
Tensile Deformation Behaviour of Notched Nano-scale Metallic Glass Specimens
The Surface Residual Stress of High-frequency Induction Brazing of Cemented Carbide to Alloy Steel

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