1) intergranular
[,intə'ɡrænjulə]
沿晶
1.
Its fracture was compound cleavage and Intergranular fracture by LOM, SEM and heat treatment experimental instrument.
分析结果表明,其断裂属于解理和沿晶复合断裂,断口解理面较大,组织中有大块自由铁素体和粗大魏氏组织。
2) intergranular crack
沿晶开裂
1.
The reinforced connector of the down tail tube in hydrogen manufacturing converted furnace was intergranular crack.
制氢转化炉下尾管加强接头发生沿晶开裂,对接头的化学成分、断口形貌、显微组织等进行了检测与分析。
2.
Along with the diversification of components,the propagation form of cracks changes from intergranular crack into transcry.
Ti/Al2O3界面处生成的Ti3Al相以及Ti3Al周围的气孔是热疲劳裂纹的主要萌生和扩展地;随着成分的变化,裂纹的扩展由沿晶开裂转变为穿晶断裂,裂纹扩展的路线并不是直线,在各梯度层间发生了裂纹的偏转。
3.
The reinforced connector of the down tail tube in hydrogen manufacturing converted furnace was intergranular crack.
制氢转化炉下尾管加强接头发生沿晶开裂,对接头的化学成分、断口形貌、显微组织等进行了检测与分析。
4) intergranular cracking
沿晶开裂
1.
The results show that the main reason for the cracking was high temperature intergranular oxidation,with the fracture morphology being a typical intergranular cracking character.
结果表明,造成主蒸汽滤网开裂的主要原因是晶界高温氧化,断口呈典型的沿晶开裂特征。
5) intergranular crack
沿晶裂纹
1.
The results show that working for long time under high temperature,the wall of reheater pipe is severely thinned with action of oxidation and erosion on the inside and outside surface,and the material of pipe becomes brittle and the intergranular crack forms.
结果表明,由于长时高温运行,再热器管在内外表面氧化腐蚀作用下,管壁严重减薄,材料组织脆化,形成沿晶裂纹,管子不足以承受管内蒸汽压力,形成脆性开裂爆口。
2.
The intergranular cracks found in transition zone were also analyzed and some advices were put forward.
结果表明,两起事故都是由叶片激光熔覆层中缺陷引起的疲劳断裂,同时还分析了过渡区附近的沿晶裂纹产生原因,并提出了一些建议。
6) intergranular fracture
沿晶断裂
1.
The results indicated that the fracture toughness reduces and the tendency to intergranular fracture increases with both reducing temperature and raising loading rate,which shows the low temperature effect and high loading rate effect and both of them promot each other.
焊缝金属沿晶脆性断裂是特定的材料因素、结构因素和环境因素共同作用的结果,沿晶脆性断裂倾向决定于晶界协调相邻晶粒塑性变形的能力,在晶界不足以协调其两侧晶粒的变形时便出现沿晶断裂。
2.
The results show that intergranular fracture prevails as quench rates decrease for the alloy with Zr<0.
1%合金随着淬火速率的降低,由穿晶破断和沿晶开裂的混合型断裂逐渐转变成沿晶断裂;其主要原因是淬火速率降低使晶界无沉淀析出带(PFZ)宽化。
3.
It is pointed out that the change of the mode from intergranular fracture to intragranular fracture cannot act as the strengthening mechanism of the ceramic, it is the important reason why the tou ghness of the ceramic cannot be improved significantly.
综述和分析了纳米碳化硅颗粒强化氧化铝基陶瓷材料的强韧化机制,认为由沿晶断裂到穿晶断裂的断裂模式的改变不是使复相陶瓷材料强韧化的机制之一,而恰恰是其韧性得不到显著提高的重要原因,并由此提出了有关复相材料新的设计思路。
补充资料：沿晶断裂
沿晶断裂
intercrystalline fracture
yanjing duanlie沿晶断裂(intererystalline fraeture)金鼠材料中的裂纹沿晶界扩展而产生的一种断裂。当沿晶断裂断口形貌呈粒状时又称晶间颗粒断裂。多数情兄下沿晶断裂属于脆性断裂，但也可能出现韧性断裂，女口高温蠕变断裂。产生沿晶断裂一般有3种原因:(l)晶界上有脆性沉淀相。如果脆性相在晶界面上覆盖得不连续，例如AIN粒子在钢的晶界面上的分布，将产主微孔聚合型沿晶断裂;如果晶界上的脆性沉淀相是奎续分布的，例如奥氏体Ni一Cr钢中形成的连续碳化勿网状，则将产生脆性薄层分裂型断裂。(2)晶界有使其弱化的夹杂物。如钢中晶界上存在P、S、As、Sb、Sn等元素。(3)环境因素与晶界相互作用造成的晶界弱化或脆化，例如高温蠕变条件下的晶界弱化，应力腐蚀条件下晶界易于优先腐蚀等，均促使沿晶断裂产生。 沿晶脆性断裂断口宏观形貌一般有两类:(l)晶位特别粗大时形成石块或冰糖状断口;(2)晶粒较细时形成结晶状断口。沿晶断裂的结晶状断口比解理断裂均结晶状断口反光能力稍差，颜色黯淡。将金属进行是纯、净化晶界、防止杂质原子在晶界偏聚或脱溶(见目溶处理)、防止第二相在晶界上析出、改善环境因素等，均可减少金属发生沿晶脆性断裂的倾向。 (杨觉先)
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