The purpose of this paper gives some theoretic reference for seismic design of steel frame structure through the elastic - plastic analysis on the seismic capability of steel frame with semi - rigid connections under severe earthquakes 本文的目的是通過(guò)對(duì)鋼結(jié)構(gòu)在彈塑性條件下的抗震性能的分析研究,為鋼結(jié)構(gòu)抗震設(shè)計(jì)提供一定的理論參考。
When the specimens are deformed in a long time at the optimal superplastic deformation condition , the microstructure is coarsened sharply . if the deformation time is shortened properly or the deformation temperature is decreased appropriately or strain rate is increased , homogeneous and fine equiaxed crystal microstructure can be obtained 在最佳超塑性條件下長(zhǎng)時(shí)間變形時(shí),合金顯微組織將發(fā)生明顯粗化,適當(dāng)縮短變形時(shí)間、或適當(dāng)降低超塑變形溫度及提高應(yīng)變速率,可得到均勻細(xì)小的等軸組織。