Journal of The Japan Institute of Metals最新文献_第4页

Cr-Mo-N被膜の硬度および摩擦摩耗特性に及ぼすCu添加の影響 Cu添加对Cr-Mo-N被膜的硬度和摩擦磨损特性的影响

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-03-27 DOI: 10.2320/JINSTMET.JBW201613

優鈴木, 祐司須藤, 大輔安藤, 淳一小池

引用次数: 0

Effect of Ti and Al Contents on γ′ Morphology in Wrought Ni-based Superalloys Ti和Al含量对变形镍基高温合金γ′形貌的影响

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-02-24 DOI: 10.2320/jinstmet.j2016062

Hiromu Hisazawa, Y. Terada

引用次数: 0

Effects of Two-Phase Microstructure Morphology on Mechanical Properties in Co-Base Heat Resistant Alloys Strengthened by E2 1 -（Co, Ni） 3 AlC Phase E2 1 -(Co, Ni) 3alc相强化Co基耐热合金力学性能的影响

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-02-17 DOI: 10.2320/jinstmet.jbw201611

Mami Kasakura, Y. Kimura

{"title":"Effects of Two-Phase Microstructure Morphology on Mechanical Properties in Co-Base Heat Resistant Alloys Strengthened by E2 1 -（Co, Ni） 3 AlC Phase","authors":"Mami Kasakura, Y. Kimura","doi":"10.2320/jinstmet.jbw201611","DOIUrl":"https://doi.org/10.2320/jinstmet.jbw201611","url":null,"abstract":"Two-phase microstructure consisting of the E21 type (Co, Ni)3 AlC, κ phase, and (Co, Ni) primary solid solution, α phase, forms having three different characteristic morphologies in the same alloy according to their thermal history. Two of them are observed in the as-cast microstructure; the primary α phase dendrite with fi ne cuboidal κ precipitates, and the eutectic lamellar consisting of α and κ phases. During heat treatments of the alloys at high temperatures, the nodular type discontinuous precipitation (DCP) lamellar, consisting of α and κ phases, forms locally in the primary α dendrite regions as the third morphology. The interlamellar spacing and nodule size of the DCP lamellar becomes larger with increasing heat treatment temperature. Micro-Vickers hardness numbers of the α primary dendrites having κ precipitates and the eutectic lamellar are comparable, and higher than those of the DCP lamellar. The alloy annealed at 1173 K for 96 h exhibits high yield strength, the 0.2% proof stress, exceeding about 800 MPa in compression, and the excellent ductility of 13.6% plastic strain at room temperature in tension. On the other hand, the DCP lamellar formation lowers the strength of the alloys, however high strength about 750 MPa can be maintained in the alloy heat treated at the highest temperature of 1373 K as the lowest yield stress of all. Elevated temperature strength measured at 1123 K for the alloy heat treated at 1173 K is 486 MPa of yield stress in compression. The DCP lamellar formation can be suppressed by the two-step heat treatments and by the unidirectional solidifi cation. The former has more homogeneous distribution of fi ne DCP lamellar than single-step heat treated alloys. The latter is very effective to improve the homogeneity and thermal stability of α and κ twophase aligned microstructure and to maintain high temperature strength of 452 MPa at 1123 K. [doi:10.2320/jinstmet.JBW201611]","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":"114 1","pages":"234-243"},"PeriodicalIF":0.0,"publicationDate":"2017-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79212391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

大気圧走査電子顕微鏡ASEMによる液相での金のマイクロ粒子生成のin-situ観察通过大气压力扫描电子显微镜ASEM在液相中金微粒子生成的in-situ观察

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-02-10 DOI: 10.2320/JINSTMET.JE201605

泰也松野, 江里小此木, 彰大吉村, 真理佐藤, 主税佐藤

引用次数: 0

Ti-5Al-2Sn-2Zr-4Cr-4Mo（Ti-17）合金の静的熱処理過程の粒成長および静的球状化 Ti-5Al-2Sn-2Zr-4Cr-4Mo（Ti-17）合金の静的熱処理過程の粒成長および静的球状化

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-02-01 DOI: 10.2320/JINSTMET.J2016043

玄山根, 洋明松本

引用次数: 1

Ti-6Al-4Vレーザー積層材の組織と機械的特性 Ti-6Al-4V激光积层材料的组织和机械特性

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-01-20 DOI: 10.2320/JINSTMET.J2016042

勇也櫻井, 幸次筧

引用次数: 3

Recent Research in Solvent Extraction of Platinum Group Metals 溶剂萃取铂族金属的研究进展

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-01-01 DOI: 10.2320/JINSTMET.JE201604

H. Narita, Tomoya Suzuki, R. Motokawa

引用次数: 10

Formation of Fine Protrusions by Sputter Etching of Commercially Pure Titanium 工业纯钛溅射蚀刻精细凸点的形成

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-01-01 DOI: 10.2320/JINSTMET.J2016064

K. Nakasa, A. Yamamoto, T. Kubo, Rongguang Wang, T. Sumomogi

引用次数: 2

Influences of Concentration and Thickness of MgCl 2 Solution Layer on Pit Initiation of Type 304 Stainless Steel in Atmospheric Environment 大气环境下mgcl2溶液层浓度和厚度对304不锈钢起坑的影响

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-01-01 DOI: 10.2320/JINSTMET.JAW201607

Youhei Hirohata, H. Ota, T. Haruna, K. Noda

{"title":"Influences of Concentration and Thickness of MgCl 2 Solution Layer on Pit Initiation of Type 304 Stainless Steel in Atmospheric Environment","authors":"Youhei Hirohata, H. Ota, T. Haruna, K. Noda","doi":"10.2320/JINSTMET.JAW201607","DOIUrl":"https://doi.org/10.2320/JINSTMET.JAW201607","url":null,"abstract":"This paper aimed to investigate conditions for pit initiation on type 304 stainless steel under MgCl2 solution layer in atmospheric environment using a CCD camera system and a surface potential measurement equipment. A droplet of dilute MgCl2 solution was put on the specimen. The specimen was set in the chamber with a relative humidity of 33% in order to make the droplet dry into the layer. The CCD camera system was employed to observe the change in the shape of the droplet and in the specimen surface during the drying process. In addition, the surface potential measurement equipment was applied for monitoring the surface potential of the specimen with the layer. When the droplet of dilute solution became thin and saturated, pitting corrosion occurred and the surface potential rapidly lowered. By contrast, thick and saturated layer did not induce pitting corrosion and the surface potential indicated the relatively low and steady. Therefore, it was revealed that the atmospheric corrosion occurred on the steel under saturated MgCl2 solution layer whose thickness less than 0.2 mm. [doi:10.2320/jinstmet.JAW201607]","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":"24 1","pages":"115-119"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74857180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Initial Grain Size Prior to ECAP-Cold Rolling Processing on the Riding and Formability of Ferritic Stainless Sheets 冷轧前初始晶粒尺寸对铁素体不锈钢板骑乘性和成形性的影响

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-01-01 DOI: 10.2320/JINSTMET.J2017044

Mitsuaki Adachi, M. Yuasa, H. Miyamoto, H. Fujiwara, M. Hatano

{"title":"Effect of Initial Grain Size Prior to ECAP-Cold Rolling Processing on the Riding and Formability of Ferritic Stainless Sheets","authors":"Mitsuaki Adachi, M. Yuasa, H. Miyamoto, H. Fujiwara, M. Hatano","doi":"10.2320/JINSTMET.J2017044","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2017044","url":null,"abstract":"Equal–channel angular pressing (ECAP) was applied to hot–bands by one pass prior to cold–rolling and annealing in order to modify the texture, and improve the ridging and formability of ferritic stainless steel sheets. The present study focuses on the effect of initial grain size before ECAP, using the samples having extremely large grain size of 210 μm and smaller ones of 30 μm. The final grain sizes of cold–rolled and annealed sheets were about 30 μm for both processes. It was found that Rankford value (r–value) of large grain size was higher compared with that of smaller one while ridging was alleviated in the latter. The recrystallization temperature of cold–rolled sheets was about 50°C lower in the larger grain size. It is considered that higher density of grain–scale shear bands in the sample of larger grain size promotes recrystallization and reduction of <001>//ND grains and increase <111>//ND grains, resulting in higher r–value. However, coarser arrangement of <001>//ND colony parallel to the rolling direction in large grain size may causes higher ridging in spite of the lower fraction <001>//ND grains. [doi:10.2320/jinstmet.J2017044]","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":"28 1","pages":"52-57"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74922868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0