【The Effect of Pre-Thermal and -Load Conditions on IN-718 High Temperature Fatigue Life】
#论文# #合金# #裂纹# #疲劳寿命#

Ni based_superalloys are widely used in engine components and many other power generation applications due to their exceptional properties at high temperatures. One of the most critical characteristics of these materials is their resistance to fatigue crack initiation at operational temperatures. In this paper, Ni-based superalloy (IN-718) is tested at 500˚C under operational loading condition to investigate whether specific initial conditions will improve the fatigue life of IN-718 samples through the cube slip activation.

DOI: 10.4236/ojapps.2022.123028

https://t.cn/A66WgqjE

【#3月31日新增1787例本土确诊#】The Chinese mainland on Thursday reported 1,787 locally transmitted COVID-19 cases, the National Health Commission said on Friday. Of the new local infections, 1,363 were reported in Jilin, 358 in Shanghai, 16 in Heilongjiang, 10 in Zhejiang, and nine in Jiangsu. The rest of the cases were reported in 13 other provincial-level regions, according to the commission. 3月31日0—24时，31个省（自治区、直辖市）和新疆生产建设兵团报告新增确诊病例1827例。其中境外输入病例40例，含22例由无症状感染者转为确诊病例；本土病例1787例（吉林1363例；上海358例；黑龙江16例；浙江10例；江苏9例；福建5例；山东4例；广东4例；河南3例；湖南3例；河北2例；辽宁2例；安徽2例；海南2例；天津1例；江西1例；四川1例；贵州1例），含56例由无症状感染者转为确诊病例。无新增死亡病例。新增疑似病例2例，均为境外输入病例（均在上海）。

国家超算深圳中心联合中南大学、瑞士联邦材料科学与技术研究所、厦门大学等，利用超算技术，针对电池化学稳定性不足、寿命短、能量密度较低等问题，研制了一种新型电池材料，实验表明，电池的功率性能和循环稳定性，得到显著提高。相关成果《In situ inorganic conductive network formation in high-voltage single-crystal Ni-rich cathodes》已发表在《自然通讯》杂志。国家超算深圳中心李扬中博士为该文共同作者，他承担了高性能计算方面的工作。https://t.cn/A66XG39S