Results 21 to 30 of about 369,030 (264)

Effects of Natural Aging and Discontinuous Cyclic Loading on High Cycle Fatigue Behavior of Steels

Metals, 2023
Metallic components may not be used immediately and are stored for several months or years after fabrication in some cases, which experience long-term natural aging. Moreover, the fatigue-beared components commonly suffer discontinuous cyclic loadings in
Gen Li, Jiajun Liu, Jian Sun, Chengqi Sun   +3 more
doaj   +1 more source

Impact of Natural Degradation on the Aged Lignocellulose Fibers of Moroccan Cedar Softwood: Structural Elucidation by Infrared Spectroscopy (ATR-FTIR) and X-ray Diffraction (XRD)

Fermentation, 2022
The aims of this study are to investigate the structure of four historical Moroccan cedar softwood samples of different aging time duration (16th, 17th, 19th, 21st centuries) and compare among these four samples, using two analytical methods, FTIR and ...
Yousra Bouramdane, Somia Fellak, Fouad El Mansouri, Abdellatif Boukir   +3 more
doaj   +1 more source

Performance Degradation Prediction and Reliability Evaluation of Rubber Aging in Natural Environment Under Alternating Cyclic Thermal Load

IEEE Access, 2019
With a focus on predicting the degradation of rubber performance in the natural environment and evaluating its reliability, the distribution law of accelerated aging life is analyzed through the accelerated aging test of hot oxygen.
Qiaobin Liu, Wenku Shi, Kunhen Li, Zhiyong Chen, Helong Liu   +4 more
doaj   +1 more source

Transcriptome-Wide Characterization of Seed Aging in Rice: Identification of Specific Long-Lived mRNAs for Seed Longevity

Frontiers in Plant Science, 2022
Various long-lived mRNAs are stored in seeds, some of which are required for the initial phase of germination and are critical to seed longevity. However, the seed-specific long-lived mRNAs involved in seed longevity remain poorly understood in rice.
Bingqian Wang, Songyang Wang, Yuqin Tang, Lingli Jiang, Wei He, Qinlu Lin, Feng Yu, Long Wang, Long Wang   +8 more
doaj   +1 more source

Influence of Short-Term Heat Treatment on the Mechanical Properties of Al–Mg–Si Profiles

Metals, 2018
Aluminum profiles—for instance, profiles made of precipitation-hardenable alloys—are increasingly used for decorative details in the automotive industry. Typically, after hot extrusion and at least two to three days of natural aging (NA), the
Sandra Kernebeck, Sebastian Weber
doaj   +1 more source

Effect of Mo Alloying on the Precipitation Behavior of B2 Nano-Particles in Fe-Mn-Al-Ni Shape Memory Alloys

Metals, 2022
In Fe-Mn-Al-Ni shape memory alloys, the stabilization of superelasticity would be affected by the undesired precipitation of B2 nano-particles during natural aging.
Liqiu Yong, Yang Zuo, Lixin Sun, Huabei Peng, Xuguang An, Hui Wang, Yuhua Wen   +6 more
doaj   +1 more source

X-Ray Dating of Ancient Linen Fabrics

Heritage, 2019
We propose a new method for dating ancient linen threads by inspecting their structural degradation by means of wide-angle X-ray scattering. X-ray dating of a textile sample can be performed nondestructively and on a submillimeter area, e.g., 0.2 0.5 mm2,
Liberato De Caro, Cinzia Giannini, Rocco Lassandro, Francesco Scattarella, Teresa Sibillano, Emilio Matricciani, Giulio Fanti   +6 more
doaj   +1 more source

Quantitative Research on the Effect of Natural Aging on the Mechanical Properties and Bake Hardening Properties of AA6014 Alloy within Six Months

Metals, 2021
This article is dedicated to quantitatively and systematically revealing the changes of mechanical properties and bake hardening properties of AA6014 alloy during six-month natural aging in detail. Three directions (0, 45, and 90° relative to the rolling
Zhengwei Gu, Yuting Han, Ziming Tang, Lingling Yi, Ge Yu   +4 more
doaj   +1 more source

Impact of chitosan oligosaccharide on microbiota-metabolite-immune axis in natural aging. [PDF]

Front Nutr
Natural aging involves an imbalance in gut bacteria, changes in metabolism, and mild ongoing inflammation. The integrated impact of chitosan oligosaccharide (COS) on microbiota-metabolite-immune interactions in a physiological (non-accelerated) aging ...
Liu W, Shi P, Xiao Y, Yang X, Tian B.
europepmc   +2 more sources

Study of performance of aerostat envelope materials on the coast

Frontiers in Materials, 2022
In this article, the performance of several naturally aged envelope materials in Hainan, China, was studied. The results show that the outer layer contributes to the properties of the envelope materials, where PVF and PVDF are better candidates for a ...
Jing Lv, Yan Zhou, Yuanping Zhang, Ying Nie, Qian Wang   +4 more
doaj   +1 more source