Material Science in Additive Manufacturing: Warpage Prediction of PBF Parts Using CTE

Residual stress can lead to warpage of a 3D-printed part. Both Dynamic Mechanical and Thermomechanical Analysis are capable to estimate warpage. In this video, Dr. Natalie Rudolph explains, how the coefficient of thermal expansion (CTE), measured with Thermomechanical Analysis, can be used to predict and calculate warpage.

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One Click AutoEvaluation for Dilatometer Signals (dL) Improved

AutoEvaluation is an intelligent software algorithm and part of the NETZSCH Proteus® software, which automatically and autonomously evaluates thermo-analytical measurement curves. It has already been introduced and successfully applied for Differential Scanning Calorimetry and Thermogravimetric Analysis and is also available for dL signals as generated by dilatometers (DIL) and thermomechanical analyzers (TMA). As an improvement, the mean CTE (Coefficient of Thermal Expansion) values are evaluated additionally before and after the glass transition.

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Coefficient of Thermal Expansion: A Crucial Material Property

NETZSCH Kunststoffe TMA CTE

The design of parts and components made of fiber-reinforced composites needs to take the coefficient of thermal expansion into account because it determines the extent to which a material changes its dimensions when heated or cooled. Thermomechanical Analysis is the perfect method to predict product performance and processing behavior. Read our contribution to the journal Kunststoffe International for an overview of applications.

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Der Wärmeausdehnungskoeffizient: Eine entscheidende Materialeigenschaft

NETZSCH Kunststoffe TMA CTE

Bei der Konstruktion von Bauteilen und Komponenten aus Faserverbundwerkstoffen muss der Wärmeausdehnungskoeffizient berücksichtigt werden, denn er bestimmt, wie stark sich ein Material bei Erwärmung oder Abkühlung in seinen Dimensionen verändert. Thermomechanische Analyse (TMA) ist die perfekte Methode für die Vorhersage der Produktleistung und des Verarbeitungsverhaltens. Lesen Sie unseren Beitrag in der Zeitschrift Kunststoffe!

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Estimating Warpage of Selective Laser Sintering Parts Using Thermomechanical Analysis

Warpage SLS TMA NETZSCH

The plastics used in Selective Laser Sintering (SLS) have a higher thermal expansion when compared with other materials. Therefore, it is important to know how the dimensions of an SLS part change at different temperatures during the build and during use. The higher the thermal expansion coefficient, the more prone are the parts to warpage or curling and the build-up of residual stresses. Learn more!

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What TMA Measurements Can Tell About Filler Orientation in Injection Molding

Fillers have long played an important role in the polymer manufacturing industry. An important property to measure how the filled material changes in length when being heated or cooled is the coefficient of thermal expansion. Knowledge about this material behavior is required to be able to determine important design values. Learn how the flow field and sample preparation influences the property and see how measurements with the TMA 402 F3 Hyperion® Polymer Edition are carried out.

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