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| 1 | Effects of Hydrogen on Behaviour of Low Cycle Fatigue of 2.25Cr-1Mo Steel显示文摘The effects of hydrogen atoms on behaviour of low cycle fatigue of 2.25Cr-1Mo steel have been investigated in present work. The results indicate that the cyclic softening rate and low cycle fatigue life are respectively increased and reduced remarkably by hydrogen atoms. In addition, hydrogen atoms make the original stress amplitude of low cycle fatigue increase, which is because of the drag effect of hydrogen atoms on the moving dislocations. Analyses using electron microscopy show that hydrogen atoms accelerate crack initiation of low cycle fatigue from inclusion and transfer the source of low cycle fatigue crack from the surface of specimen to the inclusion, which results in the marked decrease of low cycle fatigue life. The increase of cyclic softening rate for hydrogen charged specimen is due to hydrogen atoms accelerating the initiating and growing of microvoids from the secondary phase particles in the steel. The reducing of the drag effect of hydrogen atoms on moving dislocations is also helpful to the increase of the cyclic softening rate. | Guangwei HAN and Di FENG (Central Iron & Steel Research Institute, Beijing, 100081, China)(To whom correspondence should be addressed)Yujiu SONG(Dept. of Mater. Sci. & Eng., Xi’an Jiaotong University, Xi’an 710049, China) | 1995 | Journal of Materials Science & Technology1995，11，5： | 5 |
| 2 | Early detection of premalignant lesions and oral cancer显示文摘 | Steele TO Meyers A | 2011 | Otolaryngol Clin North Am2011，44，1： | 1 |
| 3 | Conversion of glycerol to hydrogen via asteam reforming process over nickel catalysts显示文摘 | ADHIKARI S FERNANDO S D TO S D F BRICKA R M STEELE P H HARYANTO A | 2008 | Energy Fuels2008，22，2： | 1 |
| 4 | Does comorbid anxiety predict quality of life outcomes in patients with chronic rhinosinusitis following endoseopic sinus surgery显示文摘 | Steele TO Mace JC Smith TL | 2015 | Int Forum Allergy Rhinol2015，5，9： | 1 |
| 5 | A thermodynamic analysis of hydrogen production by steam reforming of glycerol显示文摘 | ADHIKARI S FERNANDO S GWALTNEY S R TO S D F BRICKA R M STEELE P H HARYANTO A | 2007 | Int J Hydrogen Energy2007，32，14： | 1 |
| 6 | Does comorbid obesity impact quality of life outcomes in patients undergoing endoscopic sinus surgery 显示文摘 | Steele TO Mace JC DeConde AS | 2015 | Int Forum Allergy Rhino2015，5，12： | 1 |
| 7 | Investigation on Cracking in the Surfacing Welding Layer of Ni_3Al Based Alloy显示文摘Investigation has been made into the causes of cracking in the Surfacing welding layer of Ni3Al based alloy by analysing both the liqu id-to-solid transformation in the molten pool and the distribution of thermal stress within the surfacing welding layer. The results show that cracking in the surfacing welding layer is directly related to the producing of eutectic phase β’ (NiAl) in the interdendritic region and high thermal stress within the surfacing welding layer. When the process of electric arc surfacing welding is changed from along straight line to along' Z' pattern, cracking in the surfacing welding layer of Ni3Al based alloy is prevented due to being reduced of both the cooling rate of liquid in the molten pool and the moving speed of the heat source. Reducing the melting volume of the substrate material by lowering the output power of electric arc welding would make the content of iron atoms in the molten pool decrease. and this also can reduce the trend of the eutectic reaction in the interdendfitic region and is helpful to Suppress cracking in the surfacing welding layer. | Guangwei HAN Di FENG and Wujun YE (Dept.5, Central Iron and Steel Research Institute, Beijing, 100081, China)(To whom correspondence should be addressed) | 1994 | Journal of Materials Science & Technology1994，10，5： | 0 |
| 8 | A Preparing Process of Quick-moving Leaf for TiNi Alloy显示文摘This paper reports a preparing process of quick moving leaf for TiNi shape memory alloy. Using the process. a series of quick moving leaves having different points of temperature. from 58 to 100℃. at which they jump up have been made. The quick moving leaves will be fully qualified as the electric switches that open and close themselves at proper temperatures. | Zichang SHAO Jingcheng WANG and Wei ZHANG (No. 1 Materials Research Dept., Shanghai Iron and Steel Research Institute, Shanghai, 200940, China)(To whom correspondence should be addressed) | 1994 | Journal of Materials Science & Technology1994，10，5： | 0 |
| 9 | Electronic Structure of the Clusters Containing Oxygen in Ni显示文摘The electronic structure of the clusters containing oxygen, the stacking fault and the complex in the transition metal Ni are calculated by the multiple-scattering Xa method. Energy levels,density of states and transfer of charge are obtained. Based on the calculation and analysis,the influences of impurity oxygen and structure defect on the electronic structure of the clusters are discussed, and it is found that the local Ni-o cluster with the interstitial oxygen is a stable atomic configuration. | Tao YU Chongyu WANG and Bing WANG (Central Iron and Steel Research Institute, Beijing 100081, China)(To whom correspondence should be addressed)( The International Centre for Materials Physics of the Chinese Academy of Sciences, Shenyang 110015, China) | 1996 | Journal of Materials Science & Technology1996，12，6： | 0 |
| 10 | Electronic Structure Effect on Model Cluster for L1_2 Structure of Al_3Ti Intermetallic Compound with an Addition of Alloying Elements Fe, Ni and Cu显示文摘By use of self-consistent field Xα scattered-wave (SCF-Xα-SW) method, the electronic structure was calculated for four models of Ti4Al14X (X=Al, Fe, Ni and Cu) clusters. The Ti4Al14X cluster was developed based on L12 Al3Ti-base intermetallic compound. The results are presented using the density of states (DOS) and one-electron properties, such as relative binding tendency between the atom and the model cluster, and hybrid bonding tendency between the alloying element and the host atoms. By comparing the four models of Ti4Al14X cluster, the effect of the Fe, Ni or Cu atom on the physical properties of Al3Ti-based L12 intermetallic compounds is analyzed. The results indicate that the addition of the Fe, Ni or Cu atom intensifies the relative binding tendency between Ti atom and Ti4Al14X cluster. It was found that the Fermi level (EF) lies in a maximum in the DOS for Ti4Al14Al cluster; on the contrary, the EF comes near a minimum tn the DOS for Ti4Al14X (X=Fe, Ni and Cu) cluster. Thus the L12 crystal structure for binary Al3Ti alloy is unstable, and the addition of the Fe, Ni or Cu atom to Al3Ti is benefical to stabilize L12 crystal structure. The calculation also shows that the Fe, Ni or Cu atom strengthens the hybrid bonding tendency between the central atom and the host atoms for Ti4Al14X cluster and thereby may lead to the constriction of the lattice of Al3Ti-base intermetallic compounds. | Senying LIU Rongze HU Dongliang ZHAO and Chongyu WANG(Central Iron and Steel Research Institute, Beijing, 100081, China)(To whom correspondence should be addressed)Ping LUO(National Research Cent or Certified Materials, Beijing, 100013, China)Zhongjie P | 1995 | Journal of Materials Science & Technology1995，11，5： | 0 |
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