Kriyojenik sıcaklığın karaçam (Pinus nigra) odununun eğilme davranışına etkisinin incelenmesi

Abstract

Bu çalışmada karaçam (Pinus nigra) odununun kriyojenik sıcaklıklarda eğilme davranışındaki değişimi incelenmiştir. Odun numuneleri kriyojenik olarak 10 dakika süreyle −196°C’de sıvı azot içinde bekletilmiş ve numuneler oda sıcaklığında (+22°C) test edilmiştir. ASTM D4761-19 standardına göre gerçekleştirilen üç nokta eğilme testleri sonucu oda sıcaklığında maksimum kuvvet 1564,38 N olarak ölçülürken kriyojenik numunede 2073,02 N değerine ulaşılmış ve eğilme mukavemetinin yaklaşık %32 arttığı gözlemlenmiştir. Kriyojenik işlem görmüş numunelerde daha gevrek bir kırılma davranışı ve daha az uzama tespit edilmiştir.

Keywords

• Karaçam (Pinus nigra)
• kriyojenik sıcaklık
• sıvı azot
• eğilme direnci
• mekanik özellikler

Investigation of the effect of cryogenic temperature on the bending behavior of Crimean pine (Pinus nigra) wood

Abstract

In this study, the change in the bending behavior of Crimean pine (Pinus nigra) wood at cryogenic temperatures was investigated. The wood samples were cryogenically treated by immersion in liquid nitrogen at −196°C for 10 minutes, and the tests were conducted at room temperature (+22°C). According to the ASTM D4761-19 standard, three-point bending tests were performed. The maximum force at room temperature was measured as 1564.38 N, while the cryogenically treated samples reached 2073.02 N, indicating an approximate 32% increase in bending strength. The cryogenically treated samples also exhibited a more brittle fracture behavior and lower elongation.

Keywords

• Larch (Pinus nigra)
• cryogenic temperature
• liquid nitrogen
• bending strength
• mechanical properties.

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