High-temperature deformation behavior of Cu–6.0Ni–1.0Si–0.5Al–0.15?Mg–0.1Cr alloy

The hot compression deformation behavior of Cu–6.0Ni–1.0Si–0.5Al–0.15?Mg–0.1Cr alloy with high strength, high stress relaxation resistance and good electrical conductivity was investigated using a Gleeble1500 thermal–mechanical simulator at temperatures ranging from 700 to 900?°C and strain rates ranging from 0.001?to 1?s^?1. Working hardening, dynamic recovery and dynamic recrystallization play important roles to affect the plastic deformation behavior of the alloy. According to the stress–strain data, constitutive equation has been carried out and the hot compression deformation activation energy is 854.73?kJ/mol. Hot processing map was established on the basis of dynamic material model theories, and Prasad instability criterion indicates that the appropriate hot processing temperature range and strain rate range for hot deformation were 850~875?°C and 0.001~0.01?s^?1, which agreed well with the hot rolling experimentation results.     

Microstructure and mechanical properties of twin-roll cast Mg–4.5Al–1.0Zn sheets processed by differential speed rolling

The microstructure and mechanical properties of the twin-roll cast (TRC) Mg–4.5Al–1.0Zn alloy sheets produced by differential speed rolling (DSR) were investigated by optical microscopy, transmission electron microscope and electron backscattered diffraction. The results are compared with those of the sheet processed by equal speed rolling (ESR). It is shown that twining played an important role at the initial stage of rolling. With the increase of the rolling reduction, the microstructures in the processed sheets become more homogeneous and they are more refined by DSR than by ESR. After annealing, the sheet processed by DSR shows a higher elongation and slightly lower yield strength than those of the ESR-processed sheet, which could be attributed to grain refinement and texture weakening. These results suggest that, in comparison with conventional casting and rolling, the combined technology of TRC and DSR is a more effective way to process magnesium sheets with enhanced formability after final annealing.     

Thermal analysis and mechanical properties of Sn–1.0Ag–0.5Cu solder alloy after modification with SiC nano-sized particles

The size and morphology of intermetallic compounds (IMCs) of Sn–1.0Ag–0.5Cu (SAC105) solder alloys can have a significant influence on the mechanical strength of solder joints. The aim of the present study is to investigate the influence of SiC nano-particles addition on the microstructure, thermal behavior, and corresponding mechanical properties of SAC(105) solder alloys. Results show that the addition of SiC nanoparticles into the SAC(105) alloy melt prompts the formation of primary β-Sn phase with small sub-grain size in the solidified structure. The SiC nanoparticles can offer an additional nucleation sites for the formation of refined Ag₃Sn and Cu₆Sn₅ IMCs. The hard SiC particles and refined IMCs with small spacing could obstruct the dislocation slipping and thus, lead to a strong dispersion strengthening mechanism in the composite solder. As a result, the composite SAC(105)/SiC solder displayed a higher ultimate tensile strength and 0.2 % yield strength (0.2 %YS) than that of plain SAC(105) solder. The addition of SiC nano-sized particles can also effectively reduce the undercooling and pasty range, while the melting temperature is maintained at the SAC(105) level, indicating that the novel composite solder is fit for existing soldering process.     

Microstructure and hardness evolution during isothermal process at 700 °C for Fe–24Mn–0.7Si–1.0Al TWIP steel

The microstructure and hardness evolution of Fe–24Mn–0.7Si–1.0Al TWIP steel during recrystallization were investigated by annealing the alloy at 700 °C for different time. The deformed structure is replaced by the equiaxed grains during recrystallization. The hardness decreased significantly in the first 5 min period and then slowly. The disappearance of the dislocation and microtwins plays a much greater role than the grain coarsening on the decrease of hardness.     

Microstructure,mechanical properties,and deformation behavior of Sn–1.0Ag–0.5Cu solder after Ni and Sb additions

Minor alloying addition to solders has been an important strategy to improve the integrity and reliability of Pb-free solders joint. In this study, the effects of 0.06Ni and 0.5Sb additives on the microstructure and solidification behavior as well as the creep properties of Sn–1.0Ag–0.5Cu (SAC105) alloys were investigated. Results show that alloying of Ni and Sb resulted in considerably reduced undercooling, increased eutectic area and extended volume fraction of proeutectic Sn of which the dendritic size was refined. Moreover, with the addition of Ni and Sb into SAC105, significant improvement in creep resistance of (210%) and (350%) is realized when compared with the SAC105 solder alloy. Likewise, the creep life time of SAC105 alloys was remarkably enhanced (2–3 times) with the minor alloying additions. An analysis of the creep behavior at elevated temperatures suggested that the presence of hard Ni₃Sn₄ IMC particles and the solid solution hardening effects which appeared, respectively, in the Ni-doped and Sb-doped alloys could increase the resistance to dislocation movement, which improves the creep properties.     

Autodesk Incinerator 1.0系统隆重面市

2006年2月7日，欧特克（Autodesk）公司宣布发售一款新产品，即Autodesk Incinerator 1．0。该产品可提高Autodesk Discreet Lustre数字色彩配光系统的实时操作性和交互性。Discreet Lustre系统曾被诸多大片的制作公司选用，创造出几可乱真的视效与氛围。这些作品包括《金刚》（King Kong）、《雾都孤儿》（Oliver Twist）、《亚历山大大帝》（Alexander），以及许多电视广告。     

SO1.0——影音新时尚

SOLO本是音乐领域里的一个常用词,原意是独奏、独唱,俗一点说就是“单独的”。就这么一个颇为专业的词,最近却出现在著名音响品牌ARCAM新一代的产品上,而且听说新产品运用了一些新的理念,不免关注起来。于是与代理商联系,很快ARCAM的SOLO及一对推荐配搭的CASTLE Richmond 3i扬声器送到了我手里。     

MyPaint 1.0发布,开源绘图工具

<正>MyPaint是一个图像绘画程序。它支持的压力敏感的绘图板,并配备了一个易于使用的刷子收集。有一个复杂的接口,用于创建自己的画笔,把重点放在刷动力学(变化的速度,压力,或随机)。画布的大小是无限的,并撤消和层的支持。主要改进内容:     

实用型夹具计算机辅助设计系统FixCAD V1.0

以相似理论和成组技术为指导以短周期、低费用、高柔性为目标不仅仅使夹具设计师甩掉图板面向各行业的广大夹具设计师着眼于夹具准备的全过程优化志在共创我国夹具CAD最佳软件     

U-Guard内网安全管理系统1.0评测报告

<正>权威检测机构简介:中国人民解放军信息安全测评认证中心是经中国人民解放军保密委员会授权,依据国家、军队的有关法规和技术标准,代表军队对拟进入军队的信息安全保密防护产品(含技术系统)的安全保密性能进行检测、评估与认证的技术监督机构。其基本职责是面向军内和国内的信息安全产品研制单位提供测评认证技术服务,面向军队有关用户提供相应技术支持。     

《标准文本处理系统v1.0》通过鉴定

《标准文本处理系统v1.0》经中国标准化与信息分类编码研究所课题组一年的努力,于1995年4月通过了国家技术监督局的科技成果鉴定。 《标准文本处理系统v1.0》严格依照GB/T1.1—1993的规定,对标准文本、编制说明、意见汇总处理表等进行统一的规范和处理。 《标准文本处理系统v1.0》除了具备通用文字处理系统的功能外,有如下特点:     

A study of the magnetocrystalline anisotropy of Sm1−xDyxFe10.5Mo1.5(x = 0–1.0)

The magnetocrystalline anisotropy and the spin reorientation of Sm_1–xDy_xFe_10.5Mo_1.5 were investigated in detail. At room temperature, all Sm_1–xDy_xFe_10.5Mo_1.5 alloys possess easy c-axis anisotropy and the magnetocrystalline anisotropy field decreases with increasing Dy concentration. However, at low temperature, a spin reorientation transition of axis-to-cone type was observed in the Sm_1–xDy_xFe_10.5Mo_1.5 alloys with x0.8. The spin reorientation temperatures increase with increasing Dy concentration in the Sm_1–xDy_xFe_10.5Mo_1.5 alloys.     

DCI V1.0数字电影编解码系统关键技术研究

数字电影编解码是数字电影制作、发行和放映环节的关键技术。本文根据DCI V1．0版本技术规范，分析了数字电影编解码系统的框架，探讨了编解码中的关键技术——彩色空间转换、图像压缩算法和数字电影文件发行，介绍了基于PC平台、按照DCI V1．0技术规范要求开发的一套数字电影编解码系统。该系统编解码速度较快，符合进一步应用的要求。     

U—guard内网安全管理系统1.0研发

<正>Uguard内网安全管理系统1.0研发思想如今的安全部署有个误区,一旦遇到网络安全问题,人们总是习惯于倾向局域网外部入侵的防御,强化出口处安全设备的优化,却往往忽视来自内部网络安全的威胁,从目前的情况看,网络威胁绝大部分是来自内网,如蠕虫     

联合开发商品化实用软件FixCADV1.0的体会与启示

在总结“五校一厂一中心”联合开发商品软件FixCADV1.0的基础上,阐述了组织起来共同开发实用软件的一些体会和观点。     

SITS1.0声强分析软件包的开发与应用

本文介绍在ＩＢＭ ＰＣ系列微机上运行的、有近三十种信号处理功能的声强测试分析软件包对它的一些功能进行了讨论，并给出了应用实例。     

新型制冷剂性质计算及循环分析程序TDWX1.0

摘要为了方便空调制冷工程中新产品设计及系统优化对物性基本数据的需求，我们开发了制冷剂性质计算及循环分析软件TDWXl．0。经验证，该软件计算结果与国内外公用的标准图表吻合良好。该软件除了可作为制冷剂物性数据的计算工具，还可进行各种工质的循环分析比较，成为制冷系统优化和新产品设计的必要工具。     

分布式虚拟现实系统InteVR1.0的研究及实现

分布式虚拟现实系统向位于不同地理位置的人们提供了一种通过网络共享资源、互通信息、或对特定问题进行讨论、协作的手段。笔者对分布式虚拟现实系统的体系结构及分布式虚拟现实系统中的若干关键技术——图形平台、数据库系统及分布式环境等,进行了深入的研究,提出了相应的实现方法,并初步实现了一个桌面型分布式虚拟现实原型系统InteVR1.0。     

Structure of Mo2.0 – x Ni1.0 + x P (x = 0.2) and Some Crystal-Chemical Features of Ternary Phases in the Mo–Ni–P System

The crystal structure of Mo_{2.0 – x} Ni_{1.0 + x} P (x= 0.2) is determined by powder x-ray diffraction (monoclinic symmetry, new structure type, sp. gr. Im, a = 1.04036(5) nm, b= 0.84055(4) nm, c= 0.47357(2) nm, = 91.538(3)°; R _int = 0.094, R _prof = 0.197). The 850°C section of the Mo–Ni–P phase diagram is studied in detail, and the crystal-chemical features of molybdenum nickel phosphides are discussed.     

Improving parameters of GaSb/GaInAsSb/AlGaAsSb photodiode structures with thin active regions for the 1.0–2.5 μm wavelength range

We have studied and optimized the properties of photodiodes with a red photosensitivity threshold at 2.5 μm, which have been created on the basis of GaSb/GaInAsSb/AlGaAsSb heterostructures with Ga_0.76In_0.24As_0.22Sb_0.78 active regions of variable thickness and a reflecting contact on the rear side. It is established that a decrease in the thickness of the active region and the reflection of radiation from the rear side lead to an improvement in the parameters of photodiodes and related thermophotovoltaic converters in the 1.0–2.5 μm wavelength range. The optimized structures showed a detection ability of D*_λ = (3–6) × 10¹⁰ cm Hz^1/2/W and an open-circuit photo emf up to V _oc = 0.2 V.