《失效分析应用技术》新书介绍

由上海材料研究所教授级高级工程师王荣编著的《失效分析应用技术》一书,已于2019年4月由机械工业出版社出版。该书全面系统地介绍了失效分析中常用的分析技术和方法,内容包括失效分析概述、现场勘查技术、宏观分析技术、断口分析技术、金相分析技术、定量分析技术、X射线分析技术、电子光学分析技术、痕迹分析技术、裂纹分析技术、失效诊断技术、失效预防与安全评估、失效分析在司法鉴定中的应用、失效分析报告的撰写等。     

关于举办第二十届失效分析人员培训与认证班的通知

正由中航工业检测及焊接人员资格认证管理中心和中国航空学会主办,中航工业失效分析人员资格鉴定委员会、中航工业失效分析中心和中国航空学会失效分析专业分会共同承办的"第二十届失效分析人员培训与认证班"将于2014年6月在成都市授课。具体事项通知如下:(1)培训内容:失效分析基础、断口分析学、痕迹分析学、磨损与环境失效、非金属失效分析、电子元器件失效分析、分析思路、故障调查及典型案例分析和案例专项讨论等     

燃气轮机发电机组的振动信号监测与分析系统

研发了一套燃气轮机振动监测、故障诊断系统，系统集数据采集、分析，振动状态检测，振动故障预报、诊断为一体。系统常规的分析功能主要有频谱分析、转子轴心轨迹分析、小波分析、短时傅立叶变换、相关分析等；另外配有趋势分析、报警功能，并建立了振动故障诊断数据库，实现对燃气轮机主要部件的故障诊断。电站现场的6台燃气轮机测试结果表明，本系统的软件功能和硬件功能可以满足燃气轮机振动监测和振动故障诊断的要求。     

重庆仪表功能材料检测所 机械工业仪表材料产品质量监督检测中心

正化学分析钢铁材料(结构钢、工具钢、特殊钢、不锈钢、弹簧钢、生铁、铸铁、粉末合金)的主量和痕量元素成分分析金属及合金的主量和痕量元素成分分析铜及铜合金(纯铜、黄铜、白铜、青铜等)主量和痕量元素成分分析铝及铝合金(变形铝、铸造铝合金、压铸铝合金、纯铝等)主量和痕量元素成分分析镍基合金(高温合金、耐蚀合金、电热合金)主量和痕量元素成分分析钴基合金主量和痕量元素成分分析钛基合金主量和痕量元素成分分析镁基合金主量和痕量元素成分分析C、S、N、H、O等气体元素分析     

某海上注水井N80油管腐蚀穿孔失效分析

通过宏观分析、理化性能分析、金相分析、XRD分析、扫描电镜微观形貌分析和能谱分析、水质和细菌测试、有限元分析等方法,并结合实际现场工况,对海上某注水管柱在底部配水器下方发生局部腐蚀穿孔的原因和机理进行分析。结果表明：该油管是垢下细菌腐蚀导致的内腐蚀穿孔,酸化作业后残酸中的高Cl^-加速了局部腐蚀穿孔,据此提出采用定期投加药剂和采用耐蚀管以防止油管早期腐蚀穿孔失效的建议。     

首届非金属材料/构件失效分析学术研讨会征文通知(第一轮)

正为推动非金属材料及构件失效分析技术的进步与发展,由中国航空学会主办,中国航空学会失效分析专业分会和中国航空工业集团公司失效分析中心承办"首届非金属材料/构件失效分析学术研讨会"。会议主题为"非金属材料及构件失效分析技术的发展及应用"。一、征文范围及内容:论文内容主要涵盖橡胶、塑料、纤维、复合材料、陶瓷、涂层、油脂等非金属材料及构件的研究领域,包括:1、非金属失效分析在各领域中的地位、作用和未来发展;2、非金属     

关于举办第二十届失效分析人员培训与认证班的通知

正由中航工业检测及焊接人员资格认证管理中心和中国航空学会主办,中航工业失效分析人员资格鉴定委员会、中航工业失效分析中心和中国航空学会失效分析专业分会共同承办的"第二十届失效分析人员培训与认证班"将于2014年6月在成都市授课。具体事项通知如下:(1)培训内容:失效分析基础、断口分析学、痕迹分析学、磨损与环境失效、非金属失效分析、电子元器件失效分析、分析思路、故障调查及典型案例分析和案例专项讨论等(2)培训时间和地点:2014年6月中旬,成都市(3)培训费用:中级:3000元/班/人,高级:3100元/班/人(含培训费2200元、取证费800/900元、辅导、教材、资料、考核、证书),培训期间食宿统一安排,费用自理     

现金流量表与企业财务状况的探讨

本文分析现金流量表,可以从经营活动、投资活动和筹资活动三方面分别评价企业的财务状况。建立了以结构分析、偿债能力分析、获取现金能力分析的现金流量分析体系。     

机械制造企业失效分析数据库的开发及应用

针对笔者公司目前失效分析工作中存在的问题，开发了失效分析数据库，并在企业中进行了应用。失效分析数据库在失效分析案例文字和图片的保存、失效分析案例的查询和统计、同类失效件失效原因的归纳总结、失效分析人员经验的积累、零件生产环节质量的监控和管理等方面发挥了重要作用。     

关于举办第二十届失效分析人员培训与认证班的通知

正由中航工业检测及焊接人员资格认证管理中心和中国航空学会主办,中航工业失效分析人员资格鉴定委员会、中航工业失效分析中心和中国航空学会失效分析专业分会共同承办的"第二十届失效分析人员培训与认证班"将于2014年6月在成都市授课。具体事项通知如下:(1)培训内容:失效分析基础、断口分析学、痕迹分析学、磨损与环境失效、非金属失效分析、电子元器件失效分析、分析思路、故障调查及典型案例分析和案例专项讨论等(2)培训时间和地点:2014年6月中旬,成都市(3)培训费用:中级:3000元/班/人,高级:3100元/班/人(含培训费2200元、取证费800/900元、辅导、教材、资料、考核、证书),培训期间食宿统一安排,费用自理(4)报名人员需提交以下资料:     

油压极值比与极值比效率

文章应用基础公式,推导液压系统油压极值比与极值比效率之间的关系式。该式说明,油压极值比越大,极值比效率就越低。提出了油压极值比是可以设计和选择的。     

Precise Calibration of Ratio Transformers

The output voltages of a ratio transformer are defined at open-circuit coaxial connectors. A special socket and a difference transformer, wound with coaxial cable, are used to construct a voltage comparator accurate to 1 in 1010. Subdivided transformers are calibrated by comparing the voltage difference between taps with that of an isolated winding on the same transformer. Two similar transformers are compared directly using two voltage comparators.     

Ratio Comparisons of Impedance Standards

The application of a readily assembled comparator circuit, previously used in the comparison calibration of inductive and resistive voltage dividers, has been extended to cover the comparison of impedance standards. As an example requiring the most stringent performance from the circuit, the comparison of four-terminal inductance standards and their absolute determination in terms of the unit of capacitance have been studied. A data-reduction procedure has been devised to utilize a partial set of pair-wise comparison measurements to establish the absolute scale of inductance from 10 henrys to 500 ?H. A realistic assessment of system errors has been incorporated in the data reduction, which establishes the absolute accuracy at approximately 0.003 percent over the whole range. Determination of the quality factor Q of the inductors to better than 0.2 percent has also resulted from these measurements, principally at 1 kHz.     

Circulating Current Ratio for DC SQUIDs

The circulating current in one Josephson junction of a DC SQUID is in the direction of translation current while in the other Josephson junction is in the opposite direction. Therefore, one interesting function is the circulating current ratio (CCR) which we define as: CCR = (dissipative translation current1 − circulating current)/(dissipative translation current2 + circulating current). We discuss the circulating current ratio in the loop of DC SQUIDs by considering the 20 on-chip high T _C DC SQUIDs that Novikov et al. measured their transfer functions and flux shifts and reported in I.L. Novikov et al. (Physica C 469:30, 2009). A comparison between the CCR characteristics of those SQUIDs may be helpful in understanding the voltage-current and voltage-flux characteristics of asymmetric high T _C DC SQUIDs.     

Ratio model serves suprathreshold color--luminance discrimination

We extended earlier results [J. Opt. Soc. Am. A 16, 2625 (1999)] to examine how the responses of the three postreceptoral mechanisms are combined to subserve discrimination of suprathreshold stimuli. Test thresholds were obtained in the presence of suprathreshold pedestals selected in different quadrants of the red-green/luminance and blue-yellow/luminance planes of cardinal color space. We showed that (1) test threshold was directly proportional to pedestal contrast for pedestal contrasts exceeding five times pedestal contrast threshold, and (2) there were exceptions to this proportionality, notably when the test and pedestal directions were fixed in the cardinal directions. Results support a ratio model of suprathreshold color-luminance discrimination, in which discrimination depends on a ratio of outputs of the postreceptoral mechanisms. We also observed that when test threshold was measured as a function of test color-space direction, masking by the achromatic component of the pedestal was less than that by the chromatic component. In addition, masking by a dark (negative luminance component) pedestal was lower than masking by a light (positive luminance) pedestal of a similar contrast. Our results demonstrated that (1) there is no fundamental difference between discrimination in the isoluminant and in the two chromoluminant cardinal planes, (2) there exists the possibility that discrimination in cardinal directions differs from that in noncardinal (intermediate) directions, and (3) suprathreshold discrimination of luminance differences may be more sensitive than that of chromatic differences for a given suprathreshold pedestal.     

The Beam Ratio in Volume Holography

Abstract

Holograms for potential use as optical interconnects in micro-electronic circuits can be recorded optically by either sequential or simultaneous exposures. It is desirable that these holograms have the highest possible diffraction efficiency. In this paper, we investigate the role of the beam ratio, in both recording modes, in achieving the maximum diffraction efficiency. In the study to determine the optimum beam ratio that is needed in order to obtain the maximum diffraction efficiency on reconstruction, it is usually assumed that either the reference beam intensity, the total object beam intensity, or the average light intensity have been fixed and that the interference fringes have the highest theoretically possible contrast. According to the properties of volume phase holograms, we suggest that the total intensity of all the component beams should be the fixed parameter and that the main refractive index modulation should reach a maximum. Expressions are derived using these assumptions.     

喷射混凝土配合比设计

结合兰新铁路第二双线红山二号隧道围岩情况及开挖后初期支护喷射混凝土施工概况,主要介绍隧道开挖后初期支护用C25合成纤维喷射混凝土性能要求、现场施工原材料的选定、基准配合比计算、试拌拌合物性能、现场试喷强度及回弹率验证等过程为喷射混凝土配合比设计提供参考依据;最终确定可喷性好、早期强度发展快、回弹量小、粉尘浓度低符合环保要求、适合现场施工可喷性强的合成纤维喷射混凝土配合比设计。基于喷射混凝土施工工艺的特殊性,喷射混凝土配合比设计与普通混凝土配合比设计既有相似之处也有其特殊性,在遵守规范规定的前提下应特别重视现场试喷调整、强度验证这一过程,这是喷射混凝土配合比设计的重点和难点。     

结构—地基体系的振型阻尼比

本文基于能量比准则,推导出结构-地基体系振型阻尼比的计算公式。只要根据文中给出的公式,先计算出体系的基ω_1及基本振型阻尼比ξ_1,就可计算出结构-地基体系的振型阻尼比。这个概念还可推广用于结构-桩-地基体系的振型阻尼比计算。     

石墨球化率的数值化处理

对GB／T9441-1988标准附录A的袁1中各种形状石墨面积率的图像进行了数值化处理,并对结果进行了分类比对。结果表明：面积率难以完全描述目标的形状特性,而采用圆度对石墨球化率进行表征更具科学性和合理性,也符合当今金相分析技术向数值化发展的趋势。     

分压箱的检定数字化

分析用数字电压表检定分压箱的正确方法、接线要求、检定过程及误差分析。