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Creep properties and controlled creep mechanism of as-cast Mg-5Zn-2.5Er alloy LI Han(李 晗), DU Wen-bo(杜文博), LI Jian-hui(李建辉), LI Shu-bo(李淑波), WANG Zhao-hui(王朝辉) School of Materials Science...; Abstract: The creep behaviors of as-cast Mg-5Zn-2.5Er alloy (mass fraction, %), under various......
Al-Cu-Mg-Ag耐热铝合金高温蠕变行为刘晓艳1,潘清林1,陆智伦1,曹素芳1,何运斌1,李文斌1(1.湖南省长沙市中南大学材料科学与工程学院)摘 要:在100-210℃和150-300 MPa的条件下,研究了Al-5.3Cu-0.8Mg-0.5Ag-0.3Mn-0.15Zr耐热铝合金的蠕变行为,探讨了时效状态对合金高温性能的影响.结果表明:在相同蠕变条件下,欠时效态合金的稳态蠕变速率远远低于峰时效态合金.在210℃/200 MPa下,欠时效态合金的蠕变断裂时间为75 h,而峰时效态合金的蠕变断裂时间仅为2......
: The changing regularity of microstructures and properties of 6N01 aluminum alloys after the uniaxial tensile-creep test were studied. After creep aging under different tensile stresses, the microstructures... and tensile tests. The results show that the sample with 60 MPa loading creep stress has the highest tensile strength (341.6 MPa) after creep aging at 180 ℃ for 6 h, if the loading creep stress of CA......
; 文章编号:1672-7207(2018)08-1907-07 Effect of creep aging on mechanical properties and microstructures of Mg-8.8Gd-3.4Y-1.5Nd-0.5Zr alloy ZHANG Kai1, DENG Yunlai1, 2, SHI...) Abstract: The effect of creep aging on mechanical properties and microstructure of Mg-8.8Gd-3.4Y-1.5Nd-0.5Zr alloy were investigated by creep aging tests, Vicker hardness(HV) tests, transmission......
paper focuses on the effects of aging temperatures(700, 750, 800, 850 and 900 ℃) on microstructure, room-temperature tensile properties as well as tensile properties at 650 ℃ and creep properties at650...Microstructure and mechanical properties of a new Ti2AlNbbased alloy after aging treatmentYong-Sheng He1,2,Rui Hu1,Wen-Zhong Luo2,Tao He1,2,Yun-Jin Lai2,Yu-Jun Du2,Xiang-Hong Liu21. State Key......
Materials Science and Engineering, Ministry of Education, Central South University, Changsha 410012, China) Abstract:The effect of pre-treatment(15% pre-deformation +100 ℃ pre-aging for 5 h)on creep age... and strength but smaller elongation rate than the non-pre-treated one. Key words: creep aging; pre-treatment; microstructure; mechanical property 蠕变时效成形(Creep age forming, CAF)是将蠕变和时效热处理相结合的成形技术,即材料在一定温度和......
Engineering,Central South University,Changsha 410083,China)Abstract:The creep aging behavior of 2219 aluminum alloy was studied on the RWS-50 electronic creep testing machine at 438-458 K... and the related constants were determined. The constitutive relationship among steady creep strain rate,tested stress and aging temperature of 2219 aluminum alloy was obtained. The results show that the steady......
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) The strain caused by shrinkage and creep can be expressed as (10) where χ(t, t0) is the concrete aging coefficient; εc(t) is the concrete strain of t moment; is the concrete...J. Cent. South Univ. (2016) 23: 470-478 DOI: 10.1007/s11771-016-3092-2 Coupling model for calculating prestress loss caused by relaxation loss, shrinkage, and creep of concrete CAO Guo-hui(曹国辉)1, HU......
天飞机往返国际空间站的性能[5].其低密度,高强度以及良好的塑性等特点无疑对于航空航天领域,尤其是运载火箭,直升机和卫星都很有价值,被视为航空航天工业中最具有应用前景的轻质高强结构材料之一[6-7]. 蠕变时效(Creep aging,CA)是指材料在高温和低于材料宏观屈服极限应力下发生缓慢塑性变形的时效过程,与人工时效不同的是它在一定温度环境下还受到恒定载荷作用力,对材料内部位错,析出相分布等微...16 h时达到最高硬度185 HV. 图1 2195铝锂合金的蠕变时效硬化曲线 Fig. 1 Creep aging hardness curves of test 2195 Al-Li alloy 2.2 室温拉伸性能 图2所示为2195铝锂合金两种不同初始状态在蠕变时效过程中拉伸性能的演变.由图2可知,在蠕变时效初期,随着时效时间的延长,合金的抗拉强度(σb......
