摘要
研究了Ｍｏ和Ｎｂ的加入对Ｆｅ３Ａｌ基合金高温蠕变性能的影响．结果表明，含有Ｍｏ、Ｎｂ等元素的Ｆｅ３Ａｌ基合金在２００ＭＰａ，６００℃的蠕变中，控制蠕变速率的主要因素是亚晶胞的形成，ＭＯ加入到Ｆｅ３Ａｌ基合金中起到固溶强化的作用，Ｎｂ的加入导致形成第二相，二者均使蠕变过程中亚晶胞的形成速度减缓，使合金蠕变速率减小，蠕变寿命提高，但Ｎｂ对改善Ｆｅ３Ａｌ基合金蠕变性能的作用比Ｍｏ更大．
The effect of molybdenum and niobium additions on creep-rupture properties of Fe3Al-based alloys has been investigated.The results indicates that the main factor controlling the creep rateat 200MPa and 600℃ is the rate of subgrain formation.The addition of molybdenum results in solid-solution strengthening;while niobium addition causes the formation of second phase particles.Both ofmolybdenum and niobium addition reduce the rate of subgrain formation.So that the creep rate is de-creased and creep-rupture life is increased.However,the effect of niobium additions on improvingcreep-rupture resistance is more effective than that of molybdenum additions.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
1995年第5期91-96,共6页
Journal of Southeast University：Natural Science Edition
基金
国家863高技术资助项目
