Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Yao Zhi-Hao"'
Publikováno v:
工程科学学报, Vol 40, Iss 11, Pp 1332-1341 (2018)
The solidification behavior and microstructures evolution of cast Ni-based superalloy K424 under different cooling rates were investigated by isothermal solidification quenching experiments and differential scanning calorimetry (DSC). The microstruct
Externí odkaz:
https://doaj.org/article/e76963746de3477883d24fbf486ce09a
Publikováno v:
Cailiao gongcheng, Vol 46, Iss 8, Pp 140-147 (2018)
The surface of 20CrMnTi steel was strengthened by the square-spot laser shock peening(LSP) with 25J and 30J pulse energy. The layered style morphology, roughness, micro-hardness and residual compressive stress of the strengthened sample surface by LS
Externí odkaz:
https://doaj.org/article/abbebbb6a47a43c3911308ee553a402d
Publikováno v:
工程科学学报, Vol 40, Iss 7, Pp 822-832 (2018)
The air environment strongly influences the damage behaviors of superalloys at high temperatures. To investigate the microscopic damage mechanisms during high-temperature fatigue crack growth in standard heat-treated GH4169 superalloys, low-cycle-fat
Externí odkaz:
https://doaj.org/article/7b0f415086654a2b97f66b78463a43e9
Publikováno v:
High Temperature Materials and Processes, Vol 37, Iss 5, Pp 495-507 (2018)
Equilibrium phases in alloy A286 and the influence of element contents on gamma prime (γ′) and carbides were studied by Thermo-Calc calculation. The phase equilibria, solidification behavior, and precipitation behavior of equilibrium phases were i
Externí odkaz:
https://doaj.org/article/5167c363d53f4ab28ab2ec253a9e5923
Publikováno v:
工程科学学报, Vol 39, Iss 7, Pp 1027-1035 (2017)
The influence of non-metallic inclusion on the performance of steels is closely related to the characteristic parameters. The in-situ scanning electron microscope (SEM) observation results of the crack initiation induced by TiN inclusion under tensil
Externí odkaz:
https://doaj.org/article/a301add79c6b4585a49961e7e5fe3bb6
Publikováno v:
工程科学学报, Vol 38, Iss 10, Pp 1429-1437 (2016)
Hot tearing tends to occur when K424 superalloy is used for a turbocharger turbine wheel. To solve this problem,the alloy characteristics of K424 and K418 superalloys and the factors impacting the susceptibility to hot tearing were studied by microst
Externí odkaz:
https://doaj.org/article/3d0596ec45944b7cbcc90674d58b25c0
Publikováno v:
工程科学学报, Vol 38, Iss 9, Pp 1278-1287 (2016)
To study the microstructural stability of GH4169C alloy with high content of phosphorus and niobium, the microstruc-ture and hardness of GH4169C alloy and GH4169 alloy after long time aging were comparatively analyzed in this paper. These two su-pera
Externí odkaz:
https://doaj.org/article/7eb8d12052d1470599b03e78248bc32d
Publikováno v:
Cailiao gongcheng, Vol 44, Iss 8, Pp 34-39 (2016)
In order to simulate low vacuum experimental environment,Tb0.27Dy0.73Fe1.91 alloy round bars were prepared through melting with Tb, Dy and Fe elements, directional solidification and heat treatment in low vacuum environment. The magnetostriction of t
Externí odkaz:
https://doaj.org/article/f3a88778e618463fb2c784b9ba823d88
Publikováno v:
工程科学学报, Vol 38, Iss 2, Pp 248-256 (2016)
The fatigue crack growth rates of powder metallurgy (P/M) superalloy FGH97 with different grain sizes, γ' phase sizes and Hf contents were measured at a 650℃ high temperature condition and compared with those of FGH95 and FGH96 alloys. The fatigue
Externí odkaz:
https://doaj.org/article/131d455706ad479197699ec29ab701a0
Publikováno v:
工程科学学报, Vol 37, Iss 12, Pp 1610-1616 (2015)
A standard heat treatment(1105℃/4 h/(oil cooling) + 650℃/24 h/(air cooling) + 760℃/16 h/(air cooling)) and a subsequent long term exposure at temperatures of 720℃ for 0-5000 h and 800℃ for 0-1000 h were proposed to investigate the microstru
Externí odkaz:
https://doaj.org/article/d6b78c5dac7e4c59989f5e2f15a14f43