The fracture surface was ex-amined by using the macroscopic and micro scopic methods the results showed that small holes caused by bubble in raw material and excessive non-metallic indusions leakd to cracking in forging process and subsequendly fracturing in straightening proless.
20CrMoA抽油杆头板手方部在校直过程中发生断裂,通过对断口进行宏观和微观分析,结果表明原材料中的气泡缺陷所造成的微小孔洞和材料本身非金属夹杂物含量高导致抽油杆在锻造时开裂并在随后的校直过程中断裂。
The fracture process of metallic materials is affected by void growth and coalescence directly, most of the researchers supposed that metal is isotropic, but they ignored the factors of crystallographic orientation, inter- and intra-granular inhomogeneous deformation.
孔洞长大和聚合直接影响金属材料的断裂过程,以往的研究大多把金属当成各向同性的材料,未考虑晶体取向、晶内及晶间的不均匀塑性变形等因素。
Tiny compartments in mineral structures can shelter simple molecules, while mineral surfaces can provide the scaffolding on which those molecules assemble and grow.
矿物结构中的微小孔洞可以庇护简单分子，表面则提供了让分子聚合、长的支架。
The Preparation and Application of Large Porous/hollow Microspheres
多孔洞/空心可吸入微球的制备和应用
Microscopic mechanism of void coalescence under shock loading
冲击加载下孔洞贯通的微观机理研究
Micro-scale Effect on Dynamic Void Growth and Yield Behavior of Porous Material under Impact Loading;
冲击载荷下含孔洞材料屈服及孔洞动态演化的微尺度效应
Does supplier have the ability to plate the smallest microvias consistently and without voiding?show your evidence.
供应商有无能力在最小的微盲孔上镀上均匀且没空洞的镀层？拿出证据来。
Synthesis and characterization of PbS microcubes with holes in the surfaces
表面具有孔洞的硫化铅微立方体的制备及表征
Numerical Simulation of Micro Void Collapse in the Pure Aluminum under the Shock Compression
冲击压缩下纯铝中微孔洞塌陷的数值模拟
NEW FATIGUE CREEP LIFE PREDICTION METHOD BASED ON MICROVOIDS DAMAGE
基于微观孔洞型损伤的疲劳蠕变寿命预测方法
Micro-Analysis of the Void Growth of Aluminum under Shock Loading
冲击加载下铝中孔洞长大的微观机理分析
Application Research of Ripple Steel Tube Culvert of Small Aperture in Highway Engineering
小孔径波纹钢管涵洞在公路工程中的应用研究
A small opening or orifice, as in a body organ or passage.
小孔小口或小洞，如在人体器官或人体内的通道上的
Multi-orientated One-dimensional SAXS Study of Microvoids in PAN-based Carbon Fibers and Fibril;
PAN基碳纤维及原丝中微孔洞缺陷的一维多取向SAXS表征
Influence of Secondary Stretching Temperature on Configuration Change of Microvoids in Polyacylonitrile-based Precursor Fibres
二次拉伸温度对PAN原丝中微孔洞形貌变化的影响
A small cave or cavern.
洞穴小的山洞或洞穴
A small hole edged with embroidered stitches as part of a design.
镶边小圆孔用刺绣针法镶边的小洞，作为设计的一部分
To make a hole in or through something with or as if with a drill.
钻孔，打洞用或似用钻打洞或穿孔
The Electret Properties of Cellular PP and Solid PEN Film;
PP孔洞膜和PEN非孔洞膜的驻极体性质
Rapid EDM systems for micro and small holes with high-aspect-ratio
大深径比微小孔快速电火花加工系统