What are the thermal stress risks in aluminum outdoor sculptures exposed to open flames?

Aluminum outdoor sculptures exposed to open flames face significant thermal stress risks, which can compromise their structural integrity and aesthetic appeal. When aluminum is subjected to high temperatures, it expands unevenly, leading to warping, cracking, or even melting in extreme cases. Repeated exposure to open flames accelerates material fatigue, weakening the sculpture over time. Additionally, rapid cooling after heating can cause brittleness, making the metal more prone to fractures. To mitigate these risks, artists and installers should consider flame-resistant coatings or strategic placement away from heat sources. Understanding these thermal stress factors is crucial for preserving the longevity and beauty of aluminum outdoor artworks.