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TC18鈦合金的高溫蠕變行為
發布人：上海艾荔艾金屬材料有限公司www.jshcn.cn
更新時間：2015-08-29
對高強高韌TC18鈦合金的高溫蠕變行為進行研究，蠕變實驗的外加應力為200、250和300 MPa，蠕變溫度為400和500 ℃，蠕變持續時間為72 h。借助透射電鏡觀察蠕變后合金的微觀組織。
TC18鈦合金的高溫蠕變行為High temperature creep behavior of TC18 titanium
alloy
對高強高韌TC18鈦合金的高溫蠕變行為進行研究，蠕變實驗的外加應力為200、250和300
MPa，蠕變溫度為400和500 ℃，蠕變持續時間為72
h。借助透射電鏡觀察蠕變后合金的微觀組織。結果表明：高溫高應力狀態下，位錯攀移在蠕變過程中起主要作用；在高溫低應力或低溫高應力狀態下，合金的蠕變機理為位錯滑移。
The high temperature creep behavior of TC18 titanium
alloy was studied. The conditions of creep experiment were as follows: applied
stress 200, 250 and 300 MPa, creep temperature 400 and 500 ℃, holding time 72 h.
Transmission electric microscope was used to observe the microstructure
evolution of TC18 alloy after creep testing. The results show that, at higher
temperature and higher applied stress, dislocation climbing plays a key role
during creep deformation behavior; at higher temperature and lower applied
stress, or at lower temperature and higher applied stress, the creep mechanism
of alloy is dislocation slipping.
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