Short answer

Designers must account for the thermal limitations of WC/Co hardmetals, as their performance significantly degrades above 800°C due to microstructural changes and creep.

Field: Final Production
Source: ePrints Soton (University of Southampton) (2013)
Method: Experimental investigation
Evidence: Strong effect

High temperatures significantly degrade the hardness and wear resistance of WC/Co hardmetals due to microstructural changes and creep, impacting their suitability for high-temperature applications. This final production research insight is drawn from a 2013 study published in ePrints Soton (University of Southampton). Using Experimental investigation, researchers explored how this design variable affects real-world outcomes. The key design takeaway: Designers must account for the thermal limitations of WC/Co hardmetals, as their performance significantly degrades above 800°C due to microstructural changes and creep.

Study

Final ProductionHigh ImpactStrong effect

WC/Co Hardmetal Performance Degradation Above 800°C

High temperatures significantly degrade the hardness and wear resistance of WC/Co hardmetals due to microstructural changes and creep, impacting their suitability for high-temperature applications.

ePrints Soton (University of Southampton) · 2013

Key Findings

01High temperatures (up to 800°C) cause detrimental microstructural changes in WC/Co hardmetals.
02Creep becomes a significant damage mechanism at elevated temperatures, especially under prolonged heat exposure.
03Scratch tests revealed new insights into damage mechanisms and the formation of tribo-layers on surfaces.

Application

Design takeaway

Designers must account for the thermal limitations of WC/Co hardmetals, as their performance significantly degrades above 800°C due to microstructural changes and creep.

How to apply

When designing components for high-temperature wear environments, consult material property data that includes performance at expected operating temperatures, not just room temperature values.

Project actions

01When selecting materials for your design project, always check their performance data at the expected operating temperatures.
02Consider how heat might affect the material properties and longevity of your design.

Method & Evidence

AimTo investigate the high-temperature property-composition-microstructure interactions of WC/Co hardmetals up to 800°C and their impact on wear resistance.

MethodExperimental investigation

ProcedureThe research involved scratch tests, high-temperature indentation hardness tests, and indentation creep tests on WC/Co hardmetals. These were complemented by advanced imaging and microstructural analysis techniques (SEM, EBSD, FIB, EDX, SIMS, laser confocal microscopy). A custom high-temperature, high-vacuum microindentation test system was designed and built for these experiments.

ContextMaterials science, specifically the performance of hardmetals in high-wear, high-temperature industrial applications.

Variables

IVTemperature

DVHardness, wear resistance, microstructural changes, creep deformation

CVMaterial composition (WC/Co ratio), applied load, test duration, vacuum conditions

Strengths & Limitations

Strengths

+Comprehensive testing methods including scratch, indentation hardness, and creep tests.
+Use of advanced analytical techniques for microstructural analysis.
+Development of custom testing equipment to address research gaps.

Limitations

It can be difficult to accurately control and measure high temperatures in a simple experimental setup, and specialized equipment is often required.

Reliability & validity

The use of multiple testing methods and advanced analytical tools enhances the reliability and validity of the findings. However, the novelty of the custom-built testing system might require rigorous calibration and validation.

Think critically

How might the findings on WC/Co degradation at high temperatures influence the design of tools used in metalworking or aerospace applications?

Design Principles

"Material performance is highly dependent on operating temperature, and thermal limits must be a primary consideration in material selection for demanding applications."

Understanding the performance limits of materials like WC/Co at elevated temperatures is crucial for selecting appropriate materials for demanding applications such as hot forming, drilling, and cutting. This knowledge allows for more accurate material selection, improved product longevity, and reduced failure rates in high-stress environments.

What This Means for Your Design

This research shows that the super-hard material WC/Co gets weaker and wears out faster when it gets really hot (above 800°C) because its internal structure changes and it starts to deform slowly.

How to use in your project

1.Use this research to justify material selection for components exposed to heat, explaining why certain materials might fail or perform poorly.

Add to My Project

Quick Cite

Paragraph starter

This research highlights that materials like WC/Co, often chosen for their wear resistance, can experience significant performance degradation at elevated temperatures (above 800°C) due to microstructural changes and creep. This necessitates careful consideration of thermal operating limits during material selection for demanding applications.

Source

ePrints Soton (University of Southampton)

High temperature indentation of WC/Co hardmetals

journal · 2013

View source

Questions About This Research

What does the research say about wc/co hardmetal performance degradation above 800°c?: Designers must account for the thermal limitations of WC/Co hardmetals, as their performance significantly degrades above 800°C due to microstructural changes and creep. Evidence: ePrints Soton (University of Southampton) (2013).
Why does "WC/Co Hardmetal Performance Degradation Above 800°C" matter for design?: Understanding the performance limits of materials like WC/Co at elevated temperatures is crucial for selecting appropriate materials for demanding applications such as hot forming, drilling, and cutting. This knowledge allows for more accurate material selection, improved product longevity, and reduced failure rates in high-stress environments.
How can designers apply this research?: Designers must account for the thermal limitations of WC/Co hardmetals, as their performance significantly degrades above 800°C due to microstructural changes and creep.
What were the main findings?: High temperatures (up to 800°C) cause detrimental microstructural changes in WC/Co hardmetals.. Creep becomes a significant damage mechanism at elevated temperatures, especially under prolonged heat exposure.. Scratch tests revealed new insights into damage mechanisms and the formation of tribo-layers on surfaces.
What research method was used?: Experimental investigation.
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2013 journal from ePrints Soton (University of Southampton).
What should I do differently in my next project?: When designing components for high-temperature wear environments, consult material property data that includes performance at expected operating temperatures, not just room temperature values.
What are the limitations?: The study focused on temperatures up to 800°C; behavior above this threshold was not investigated. The development of a custom testing system introduced potential complexities.