brittle fracture

It can avoid hydrogen brittle fracture taking place effectively to control tensile stress level of spring surface layer in manufacture process, to control or avoid hydrogen atoms in circumstance to diffuse and filter, and to change galvanizing after hydrogen removing into hydrogen removing after galvanizing.

在制造工艺上控制弹簧表层的拉应力水平以及控制或避免环境中氢原子的扩散渗入，把镀锌前除氢改为镀锌后除氢，能有效地避免氢脆断裂的发生。

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By simulating of the process of uniaxial tensile tests on a certain cohesive soil, the applicability of the brittle fracture model and the corresponding calculation method for tensile failure and crack development is verified.

通过对某压实黏土单轴拉伸试验成果的模拟计算，验证了构建的脆性断裂模型和有限元算法对土体拉伸破坏特性和裂缝发展过程的适用性。

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Analysis of Brittle Fracture Cause of Steel Wire for Cement Pipe

水泥管用钢丝脆断原因分析

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Brittle fracture. Fracture that occurs by rapid crack propagation and without appreciable macroscopic deformation.

通过快速裂纹扩展发生断裂, 没有明显的宏观变形.

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The fracture mode of SPS sintered molybdenum belongs to brittle intercrystalline fracture.

SPS烧结钼的断口呈沿晶断裂,属于脆性断裂.

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The ductile to brittle fracture transition of a medium carbon steel and the thermal activation analysis

一种中碳钢的韧脆转化以及热激活分析

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The results show that the thermocouple wire was contaminated by phosphorus that came from the ambience gas, and Pt-P rich phase appeared at the grain boundary of the thermocouple wire, which caused the brittle fracture along the grain boundary, resulting in the thermocouple failure.

结果表明，热电偶保护管密封不严，使用时环境气氛与偶丝直接接触，磷杂质污染偶丝并在偶丝晶界上形成富Pt-P脆性相，造成沿晶脆性断裂，引起热电偶失效。

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The wear mechanism of alumina is brittle fracture as well as grain spalling.

偶件氧化铝的磨损机制主要是脆性断裂及晶粒剥落.

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By means of in situ SEM tensile deformation and rod sample deformation tests, the effect of brittle fracture of Nd rich second phase particles on the fracture behaviors of a near α titanium alloy has been investigated.

通过薄片试样原位拉伸和圆棒拉伸实验研究了富Nd第二相颗粒的早期脆性断裂对一种近α型钛合金断裂行为的影响。

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It was concluded that brittle fracture of the valve bodyof poor casting quality.

结果表明,该阀体爆裂属脆性断裂,爆裂系截止阀材质、组织及铸造质量差所致.

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The main effect factors bringing about brittle fracture of wire rod without drawing are carbon content, spinning temperature, speed of cooling control and contents of baneful gas.

盘条未经拉拔出现脆断的主要影响因素是碳含量、吐丝温度、控冷速度和有害气体的含量；

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Based on the experimental result, the influence of the maximum tensile stress and distortion energy density on brittle fracture and crack opening direction is analyzed by means of studying the field of distortion energy density and principal stress in the vicinity of a crack tip.

分析了裂纹尖端附近的形状改变能密度场和主应力场，结合试验数据研究了最大拉应力与形状改变比能对脆性断裂及断裂方向的影响。

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The cause of brittle fracture on hacksaw blades-blank were analyzed.

检验分析了机用锯条坯脆断的原因.

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The bracket of as-cast ferritic nodular iron breaks due to brittle fracture when it is assembled.

摘要铁素体球铁铸件支架在装配时发生脆性断裂失效.

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The bracket as-cast ferritic nodular iron breaks due to brittle fracture when it is assembled.

铁素体球铁铸件支架在装配时发生脆性断裂失效.

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Some impurity elements gathered at crystal boundary, such as O, S, C, cause brittle fracture.

晶界处聚集的O，S，C等杂质元素引起脆性断裂；

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It is found that the dominant mechanism of material removal of precision grinding for nWC/ 12Co coatings is mainly the inelastic deformation including plastic deformation with a certain amount of pulverization, and less removal from material brittle fracture.

结果表明：在大多数磨削条件下，nWC/12Co磨削的材料去除机理主要是非弹性变形方式，即以塑性变形为主，伴随一定的材料粉末化，材料较少以脆性碎裂去除。

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The results show that hot-forged cast dies take thermal wear, plastic deformation, thermal fatigue, impact fatigue fracture and brittle fracture as predominant failure patterns.

结果表明，精铸热锻模的主要失效形式为热磨损、塑性变形、热疲劳裂纹、冲击疲劳破断和脆性断裂。

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A simulation experiment using the fracturing of two-dimensional brittle glass plates is designed to study the propagation process of fracture in a brittle medium.

设计了一个二维脆性玻璃板的破裂模拟实验，以研究脆性介质的破裂传播过程。

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And rocky pattern meams brittle fracture.

脆性断裂则形成岩石状花样.

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The process is directly between the two types of metal welding, a solid solder joint appearance, there is no brittle fracture caused by tin solder, oxidation, solder false.

该工艺是两种金属之间直接熔接，焊点美观牢固，没有锡焊引起的脆裂、氧化、虚焊、假焊。

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If the hydrogen blistering is large enough, the shear crack will initiate at early growing stage of shear band, resulting in brittle fracture under low stress.

如存在较大的氢鼓泡，则当剪切带尚未充分发展时微裂纹就形核，导致低应力脆断。

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Some opinions about brittle fracture, gray spot and impurities in the weld are proposed.

对焊缝缺陷脆性断口 、 灰斑、夹杂物提出了见解.

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The results show that different CTOD values corresponding to the occurrence of brittle fracture before yield strength, brittle fracture after yield strength, and ductile fracture should be chosen as δ for different material types, temperatures and thicknesses.

结果表明：δ在材料、温度、板厚不同的情况下，应分别取脆断、韧脆破坏和韧性破坏时的CTOD值；

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We consider that mixed mode brittle fracture of sliding mode fracture exists, too. Hence we propose three criteria of mixed mode brittle fracture of sliding mode fracture the radial shearing stress criterion, the maximum shearing stress criterion and the distortional strain-energy-density criterion.

我们认为亦存在着滑开型断裂的复合型脆断，从而提出三个滑开型断裂的复合型脆断判据：径向剪应力判据、最大剪应力判据及歪形应变能密度判据。

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The erosion mechanism at 90 degrees includes block exfoliation, the plastic deformation of binder phase and the extrusion of the carbides, meanwhile, the brittle fracture character has also been observed with a speed of 420 meters per second.

90°冲蚀机制包括块状剥落，粘结相的塑性变形和碳化物的挤出，420m/s冲蚀的粘结相还表现出了脆性断裂的特点，块状剥落是质量磨损率升高的主因。

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The Mixed Mode Brittle Fracture Criteria in Sliding Mode Fracture

滑开型断裂的复合型脆断判据

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To introduce the principle and characteristic of mechanical descaling to clear oxide scale on wire rod surface. The cause for brittle fracture with the method is analyzed.

介绍机械剥壳法去除盘条表面氧化铁皮的原理和特点，分析该方法引起钢丝脆断的原因。

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Cleavage fracture is a typical brittle fracture and also a process consisted of crack producing and spreading, and the mechanism is related to dislocation and crystalline grain.

解理断裂是典型的脆性断裂，解理断裂也是一个裂纹萌生和扩展的过程，其机制与位错和晶粒有关。

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Brittle Fracture of Water Reactor Pressure Vessel& Criteria, Standard and its Use

水堆压力容器的脆性断裂&准则、标准及其应用

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