维普中文期刊产品整合服务
2篇 您的检索式:作者名="Youkang Li"
    题名 作者 年代 出处 被引量
1Deformation-induced martensitic transformation kinetics and correlative micromechanical behavior of medium-Mn transformation-induced plasticity steel显示文摘An in situ high-energy X-ray diffraction(HE-XRD) technique was mainly used to investigate the micromechanical behavior of medium-Mn Fe-0.12 C-10.16 Mn-1.87 Al(in wt%) transformation-induced plasticit(TRIP) steel subjected to intercritical annealing at 625℃, 650℃, 675℃ and 700℃ for 1 h. As the intercritical annealing temperature increased, the volume fraction of retained austenite(RA) and ultimate tensilstress(UTS) increased, while the Lüders strain and yield stress(YS) decreased. The incremental workhardening exponent of experimental steel increased with increasing intercritical annealing temperatureThe overall trend of the transformation kinetics of the RA with respect to the true strain followed thsigmoidal shape predicted by the Olson and Cohen(OC) model. Load partitioning occurred among the ferrite, austenite and martensite immediately after entering the yielding stage. Because the stability of thRA decreased with increasing intercritical annealing temperature, the load undertaken by the martensitincreased. The moderate transformation kinetics of the RA and effective load partitioning among constituent phases were found to contribute to a favorable combination of strength and ductility for thimedium-Mn TRIP steel.Minghe Zhang Haiyang Chen Youkang Wang Shengjie Wang Runguang Li Shilei Li Yan-Dong Wang 2019Journal of Materials Science & Technology2019,35,8:5
2Qualitative and quantitative analysis of glucosinolates and nucleosides in Radix Isatidis by HPLC and liquid chromatography tandem mass spectrometry显示文摘Multi-component fingerprinting and quantitation of the glucosinolates and nucleosides in samples of Radix Isatidis have been carried out using high-performance liquid chromatography with diode-array detection and electrospray ionization tandem mass spectrometry(HPLC–DAD–ESI/MS).Five nucleosides together with one glucosinolate were identified by comparing retention times,ultraviolet spectra,mass spectra and/or empirical molecular formulae of reference compounds.Quantitation of these six compounds was carried out simultaneously by HPLC on a Phenomenex Luna C18 column using gradient elution with methanol and water and detection at 254 nm.All calibration curves were linear(r40.9994)within test ranges.Limits of detection and quantitation were 0.33 ng and 2.50 ng on column,respectively.Intra-and inter-day precision(as relative standard deviation)for all analytes was o2.19%with recoveries in the range 99.6%–101.8%at three concentration levels.The validated method was successfully applied to fingerprinting and assay of 25 batches of Radix Isatidis sourced from different geographical regions of China.The method is simple and reliable and has potential value in the quality control of Radix Isatidis.Xiuming Wang Yuanyuan Xie Xiaomei Hu Youkang Li Ping Hu Yiming Wang Qionglin Liang Guoan Luo 2013Acta Pharmaceutica Sinica B2013,3,5:2
返回顶部 每页显示:
共1页 首页 上一页 第1页 下一页 末页 /1 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费