摘要
提出了钛合金塑性变形的新理论，试验结果表明，高温形变强韧化获得三态组织，这种组织既不降低材料塑性、又不丧失热稳定性，且能提高材料的使用温度与高温性能、低周疲劳性能，疲劳－蠕变寿命和断裂韧度。探讨了新理论的基础和强韧化机理，发现高温形变强韧化不仅适用于（α＋β）型合金，并可应用于ａ型、近ａ和β近型合金。
A new theory for Ti alloy plastic deformation is proposed. Experiment resultsshowed that a new kind of tri-modal microstructure could be obtained using high temperaturedeformation strength-toughening. This microstructure strikingly raised low-cycle fatigue pr-operty, fatigue-creep interaction life, fracture toughness and service temperature of Ti alloywithout reducing plasticity and thermal stability. The fundament of the new theory andstrength-toughening mechanism bare also discussed. It Was preved that high tem peraturedeformation strength-toughening was applicable not only in alloy, but also in a,near a, and nearβTi alloy.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
1996年第5期70-73,共4页
Journal of Mechanical Engineering
关键词
形变
强韧化
三态组合
钛合金
Deformation
Strength-toughening
Three-morphology microstructure
