| 1. | The impact of random grain boundary distribution and connectivity on intergranular fracture of polycrystalline materials
随机晶界分布和连通性对晶间破坏行为的影响 |
| 2. | The main fracture model of ultra fine atc ceramic is intergranular fracture . the analysis on the microstructure of the ultra fine atc ceramic demonstrated that the ceramic is intergranular - transgranular structure
超细a ， c陶瓷主要的断裂方式是沿晶断裂，伴有部分穿品断裂及塑性断裂。 |
| 3. | Above analysis can provide instructions for grain boundary design and controlling in grain boundary engineering . dynamics intergranular fracture process is modeled with considerations of grain boundaries damage
通过考虑晶界损伤，进一步对拉伸试样破坏单元的动态沿晶断裂过程进行了数值模拟分析。 |
| 4. | Based on these experiments , it may be claimed that there is segregation of sn to grain boundaries in 0 . 15 % c steel during cooling from a high solution treatment temperature . this segregation reduces grain boundary cohesion , which results in low hot ductility and intergranular fracture
通过试验和计算得出: sn在0 . 1swt . % c钢中发生非平衡晶界偏聚的临界时间为1245左右，临界冷却速率大约为8 / s ，与试验结果基本一致。 |
| 5. | The electric field strengthens the laminate boundary of 2090 alloy . the laminate strengthening mechanism translates into boundary strengthening and grain inner toughening with more ductility fracture and less intergranular fracture . the ductility property is enhanced with no change of intensity
对铝理合金sem实验发现，电场固溶和时效强化了晶界，和晶内塑性的改善，断裂特征出现由分层沿晶断裂向塑性断裂转变，断面塑性变形特征增加。 |
| 6. | The presence of small amount of liquid at grain boundaries tends to form thin viscous layer which surrounds the finer grains . intergranular fracture may occur at the grain boundaries between two fine grains not covered by viscous phases . the high ductility achieved at low strain rates is generally attributed to dislocation glide - creep accommodation mechanisms
原始晶界上产生少量液相，形成薄的固液共存粘性层并包围细化的晶粒，沿晶断裂主要发生在无粘性层的细晶粒间；而在较低应变速率下，三叉晶界位错攀援?蠕变协调机制松弛晶界滑移产生的应力集中，晶界上产生较多液相，有利于晶界滑移进行。 |
| 7. | From an examination of the tensile behavior of cz ly12 alloys under different temperature and strain rate , two kinds of deformation and intergranular fracture behaviors were observed that were opposite to the characteristic strain rate range in fine - grained superplasticity . the mechanisms are described as follows . the high ductility achieved at high strain rate is generally attributed to the dominant role of gbs accommodating mechanisms , which is considered as dislocation creep within grains controlled by subgrains
研究选用自然时效淬火态的ly12铝合金，进行了一系列不同温度和应变速率下的单轴拉伸试验， 480下，观察到与传统细晶超塑性特征区间相反的行为：较高应变速率下，动态再结晶使晶粒细化，促进了晶界滑移，亚晶界控制的晶内位错蠕变是晶界滑移的主要协调机制。 |
