Materials Science and Engineering最新文献_第2页

Alloying behaviour of Ni2AlTi and NiAl in yttria-partially stabilized zirconia Ni2AlTi和NiAl在钇-部分稳定氧化锆中的合金化行为

Materials Science and Engineering Pub Date : 1988-04-01 DOI: 10.1016/0025-5416(88)90254-6

P. Shen, S.L. Hwang

引用次数: 6

Effect of distribution of grain boundary diffusivity on plastic flow of austenitic steel II: The role of dislocation annihilation in grain boundaries in the plastic flow of polycrystalline materials 晶界扩散率分布对奥氏体钢塑性流动的影响ⅱ:晶界位错湮没在多晶材料塑性流动中的作用

Materials Science and Engineering Pub Date : 1988-04-01 DOI: 10.1016/0025-5416(88)90243-1

W.A. Swiatnicki, M.W. Grabski

{"title":"Effect of distribution of grain boundary diffusivity on plastic flow of austenitic steel II: The role of dislocation annihilation in grain boundaries in the plastic flow of polycrystalline materials","authors":"W.A. Swiatnicki, M.W. Grabski","doi":"10.1016/0025-5416(88)90243-1","DOIUrl":"10.1016/0025-5416(88)90243-1","url":null,"abstract":"<div>Analysis of the effect of temperature and grain size on the hardening process of polycrystalline material has been carried out, assuming that grain boundaries (GB) are the most important dislocations sinks, that the kinetics of dislocation annihilation are controlled by the mobility of GB dislocations and hence by GB diffusion, and that the GB diffusivity is characterized by statistical distribution. To verify the equations derived, tensile tests have been performed within the wide range of temperatures on 0.12C22Cr17Ni austenitic steel subjected to different variants of thermal treatment. It has been found that the course of the changes of the strain-hardening coefficient depends, on the one hand, on the diffusional properties of GB in a given state of material, and on the other hand on grain size and the strain rate applied. The direction and extent of the changes are more adequately described when the distribution of GB diffusivity is taken into account instead of the mean value of GB diffusivity.</div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90243-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87661631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

On the effect of the volume fraction on martensite on the tensile strength of dual-phase steel 马氏体体积分数对双相钢抗拉强度的影响

Materials Science and Engineering Pub Date : 1988-04-01 DOI: 10.1016/0025-5416(88)90232-7

A.K. Jena , M.C. Chaturvedi

{"title":"On the effect of the volume fraction on martensite on the tensile strength of dual-phase steel","authors":"A.K. Jena , M.C. Chaturvedi","doi":"10.1016/0025-5416(88)90232-7","DOIUrl":"10.1016/0025-5416(88)90232-7","url":null,"abstract":"<div>Dual-phase steels were prepared from thoroughly homogenized Fe-1.5wt.%Mn-0.1wt.%C and Fe-1.5wwt.%Mn-0.2wt.%C steels by intercritical annealing at 720, 740, 760 and 780°C. Their tensile strengths and the volume fractions of martensite and ferrite were determined. The following non-linear relation between the tensile strength and the volume fraction of martensite <math><mtext>ƒ</mtext><msub><mi></mi><mn>m</mn></msub></math> was derived. <math><mtext>σ = σ</mtext><msub><mi></mi><mn>F</mn></msub><mtext> + (σ</mtext><msub><mi></mi><mn>M</mn></msub><msup><mi></mi><mn>0</mn></msup><mtext> − σ</mtext><msub><mi></mi><mn>F</mn></msub><mtext>) ƒ</mtext><msub><mi></mi><mn>M</mn></msub><mtext> + </mtext><mtext>K</mtext><msub><mi></mi><mn>M</mn></msub><mtext>(</mtext><mtext>gC</mtext><msub><mi></mi><mn>0</mn></msub><mtext>ƒ</mtext><msub><mi></mi><mn>M</mn></msub><mtext>)</mtext><msup><mi></mi><mn><mtext>1</mtext><mtext>2</mtext></mn></msup></math>The data obtained with the two experimental steels and those measured by N. C. Goel were statistically analysed. Values obtained for various parameters were found to be reasonable. This non-linear relationship described the experimental data more satisfactorily than the linear ones.</div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90232-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90260162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 30

TEM studies of nitrides in surface-treated and implanted 12% chrome steel 表面处理和注入12%铬钢中氮化物的透射电镜研究

Materials Science and Engineering Pub Date : 1988-04-01 DOI: 10.1016/0025-5416(88)90252-2

J.A Kozubowski, W Zielinski, G Gawlik, J Jagielski, A Podgorski, J Lunarski

引用次数: 4

The kinetics of isostatic diffusion bonding in superplastic materials 超塑性材料等静力扩散键合动力学

Materials Science and Engineering Pub Date : 1988-04-01 DOI: 10.1016/0025-5416(88)90249-2

John Pilling

引用次数: 72

The atomic fingerprint of YBa2Cu3O7−x-type high-temperature superconductors observed by field ion microscopy 场离子显微镜观察YBa2Cu3O7−x型高温超导体的原子指纹图谱

Materials Science and Engineering Pub Date : 1988-04-01 DOI: 10.1016/0025-5416(88)90273-X

A.J Melmed, R.D Shull, C.K Chiang, H.A Fowler

引用次数: 5

Phase transformations of low-alloy steel at temperatures inside the eutectoid gap 低合金钢在共晶间隙温度下的相变

Materials Science and Engineering Pub Date : 1988-04-01 DOI: 10.1016/0025-5416(88)90257-1

L. Karmazin

引用次数: 8

A model for the structures of amorphous metal-metalloid alloys 非晶金属-类金属合金的结构模型

Materials Science and Engineering Pub Date : 1988-04-01 DOI: 10.1016/0025-5416(88)90266-2

Liu Rang-Su

引用次数: 4

Diffusion of antimony in amorphous and crystallized Fe82B18 锑在非晶化Fe82B18中的扩散

Materials Science and Engineering Pub Date : 1988-04-01 DOI: 10.1016/0025-5416(88)90250-9

S.K Sharma, Kuldeep, Animesh K Jain

{"title":"Diffusion of antimony in amorphous and crystallized Fe82B18","authors":"S.K Sharma, Kuldeep, Animesh K Jain","doi":"10.1016/0025-5416(88)90250-9","DOIUrl":"10.1016/0025-5416(88)90250-9","url":null,"abstract":"<div>Diffusion coefficients D of antimony in the as-quenched amorphous Fe82B18 alloy were measured in the temperature range 575–640 K by Rutherford backscattering spectrometry. The measured values of D were found to lie in the range (4.6 × 10−21)−(4.4 × 10−19) m2s−1 over the temperature range considered. An Arrhenius relation was fitted to antimony diffusivities, yielding values of 1.65 eV for the activation energy Q and 2.5 × 10−6m2s−1 for the frequency factor D0. In addition to the as-quenched samples, diffusion measurements were also carried out in relaxed (pre-annealed) and pre-crystallized specimens. The effect of relaxation treatment on D was found to be insignificant. The volume diffusion coefficients in the crystallized specimens were also found to be comparable with those in the amorphous specimens. This result is particularly striking since it is generally expected (based on extrapolation from high-temperature data) that diffusion in amorphous systems is several orders of magnitude faster than that in crystalline systems.</div>","PeriodicalId":100890,"journal":{"name":"Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0025-5416(88)90250-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78809595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

A versatile cryostat and a mutual inductance coil for a.c. susceptibility measurements on high Tc superconductors 一种多功能低温恒温器和互感线圈，用于高Tc超导体的交流敏感性测量

Materials Science and Engineering Pub Date : 1988-04-01 DOI: 10.1016/0025-5416(88)90269-8

Wenwu Cao, Mark Klemkosky, G.H Ziegenfuss, Amar Bhalla, L.N Mulay

引用次数: 3