The boride layer and the laser remelting layer possess different impact-wear mechanisms . The boride layer gives priority to intergranular brittleness fracture and transgranular fracture and exhibits friction wear bursting apart and surface desquamation while the laser remelting layer only reveals friction wear .

渗硼层和激光重熔层有不同的冲击磨损机制：渗硼层以沿晶脆性断裂和 穿 晶 剥落 断裂 为主，宏观上表现为摩擦磨损、崩裂和表层剥落，而重熔层只有摩擦磨损。

The SEM analyses of the fractured surfaces suggest that transgranular fracture happened to coarse grains and intergranular fracture to the rest of grains .

SEM断口分析发现：较大的晶粒发生 穿 晶 断裂，其余则为沿晶断裂。

Studies have shown that coarse-grained carbide fracture mode is mainly transgranular fracture need to match the greater fracture energy ; porosity impurity elements and the abnormally large grains surrounding intergranular fracture and easy to form the fracture of the alloy samples sources .

研究表明，粗晶硬质合金的断裂方式主要为 穿 晶 断裂，需要匹配更大的断裂能；孔隙、杂质元素和异常大的晶粒周围以沿晶断裂为主，容易形成合金试样的断裂源。

The fracture mainly originated from cavity and the intergranular fracture was the leading fracture mode besides the cleavage fracture and transgranular fracture .

孔洞和大颗粒 硬质 相 为主要的断裂源，断裂方式以沿晶断裂为主，同时存在着解理断裂和 穿 晶 断裂。

There are two main types of fracture observed here : one is intergranular fracture the other is transgranular fracture . From the point of technology the nature of cracks and the measures of avoiding the surface and internal cracks are analyzed .

裂纹的类型主要有两种：一种是沿晶开裂，另一种是 穿 晶 开裂.首先从工艺的角度分析了裂纹的类型、形成原因以及防止措施。

The pure molybdenum wires after annealing appear fracture along crystal but molybdenum wires with high temperature appear transgranular fracture .

退火后的纯钼丝呈沿晶断裂，而高温钼丝 呈 穿 晶 断裂。

The proportion of transgranular fracture increased significantly with the increase of SiO2 content . This shows that the brittleness of the composite is reduced and the fracture toughness is increased .

随着SiO2含量的增加， 穿 晶 断裂所占的比例明显增大，说明SiO2的加入降低了 复相 陶瓷的脆性，提高了其断裂韧性。

In fatigue crack expansion zone base metal was tough transgranular fracture however a mixed fracture characteristics of tough and brittle was noted on fractographs of fusion zone .

在疲劳扩展区，母材为韧性 穿 晶 断裂，熔合区则呈现出韧性和脆性相混合的断裂形貌；

Analysis shows that the dislocations mechanism nano-particles deposition crack deflection transgranular fracture and curved cleavage strips are main reasons for increasing the fracture toughness of the ceramic materials .

分析发现：其内部位错机制、纳米颗粒的淀析、裂纹扩展路径偏转、 沿 晶 断裂、 韧 窝及解理撕裂等是材料断裂韧性提高的主要原因。

At room-temperature the fracture form of W-Cu composite is changed from both of transgranular fracture and intergranular to intergranular alone with the rise of tungsten skeleton relative density .

对于钨渗铜材料，室温下的断裂形式为 穿 晶和沿晶 断裂两种形式并存，并且随着骨架密度的提高， 穿 晶 断裂 的 比例逐渐上升。

At the same time the electric field lessenes percentages of intergranular delamination and increases transgranular fracture and microscopic plastic deformation .

同时，固溶电场减少合金的沿晶分层断裂比例，并增加 穿 晶 断裂及微区塑性变形；

Powder mixing is the key factor in processing and transgranular fracture and crack pinning are major factors of the improvements in mechanical properties .

其中粉体的均匀混合是制备过程的关键因素， 残余应力及裂纹 偏转导致的 穿 晶 断裂以及裂纹尖端 SiC颗粒的桥联作用是 复相 陶瓷强度和韧性增加的主导因素。

Transition of fracture mode was observed and the percentage of transgranular fracture ( PTF ) as a function of the matrix stresses was figured out . The coincidence relation of mullite content matrix stresses and PTF was then established .

观察了氧化铝/莫来石复合陶瓷断裂方式的转变，计算了 穿 晶 断裂比率与基体应力的关系，进而建立了莫来石含量、基体应力、 穿 晶 断裂比率三者的对应关系。

The results of fracture surface analysis show that IF steel without boron addition exhibits the character of intergranular fracture and that with boron addition transgranular fracture which leads to the improvement of fatigue resistance .

疲劳断口分析结果表明，不加B的IF钢表现出沿晶断裂特征，加B后可使 IF钢断裂性能得以改善，表现出 穿 晶 断裂 特征。

The research status quo on the strengthening and toughening mechanisms was surveyed mainly including matrix grain fining and the transition from the intergranular to the transgranular fracture mode as well as micro crack healing in annealing treatment .

综述了目前相关的增韧补强机理的研究情况，主要包括基体晶粒的细化及由沿晶 断裂向 穿 晶 断裂模式的转变，热处理对微裂纹的愈合作用；

The indentation crack forms of the material with three-layered symmetrical structure and five-layered symmetrical structure are intergranular fracture grain bridging transgranular fracture and fracture bifurcation .

三层对称结构和五层对称结构Al2O3基梯度纳米复合陶瓷刀具材料的压痕裂纹扩展形式均为沿晶断裂、晶粒桥联、 穿 晶 断裂和断裂分叉。

Analysis of the mechanisms of fracture the fracture surface fracture that copper is the main form of toughness transgranular fracture of copper and tungsten phase and between the crystal along the fault .

分析了材料的断裂机制，其断口形貌说明断裂主要形式是铜相的韧性 穿 晶 断裂和钨相与铜相之间的沿晶断裂。

It is concluded that with the enhancement of bonding strength of phase interfaces the fracture modes of matrix and second phase are both changed from intergranular fracture to transgranular fracture and further lead to the enhancement of tensile strength and fracture toughness .

模拟结果表明，随着相界面结合强度的提高，基体和第二相的断裂模式均由沿晶断裂向 穿 晶 和 沿 晶 混合 断裂 转变，抗拉强度和断裂韧度随之提高。