高温用マイクログリッドによる粒界すべりの測定と表面き裂生成過程の観察

概要

論文の詳細を見る
Three kind of fiducial microgrids sliding. with ion etched groove, deposited gold and deposited platinum lines were made on creep specimens by electron lithgraphy using a usual scaning electron microscope, and assessed for high temperature use, particulary for the measurements of micro deformation during creep. The assessment showed that the microgrid with ion etched groove lines is most stable at high temperatures and suitable for the measurement of local micro deformation such as the grain boundary sliding. Using the microgrid with ion etched groove lines, the grain boundary sliding during creep in a 321 stainless steel was measured, and effect of grain boundary tripe point on the sliding and the morphologies of grain boundary cracks at surface were studied quantitatively and geometrically, respectively. It was suggested that the formation of a micro crack at the triple point allows the sliding easily, while a flawless triole point arrests thesliding evdently. Also it was confirmed that geometrical factors such as the morphologies and size of the surface cracks are controlled mainly by the direction and amount of the sliding.
社団法人日本材料学会の論文
1990-06-15