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effect of initial microstructure on the creep behavior of

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Creep-Induced Phase Instability and Microstructure

AMSE. Home; About AMSE Creep-Induced Phase Instability and Microstructure AMSE. Home; About AMSE

Creep-Induced Phase Instability and Microstructure

AMSE. Home; About AMSE EFFECT OF MICROSTRUCTURE ON CREEP MECHANISMS IN The viscous flow of an amorphous grain boundary phase and uninhibited grain boundary sliding resulted in a fast initial creep regime characterized by a stress exponent = 1.8 and an activation energy = 509 kJ mol{sup {minus}1}, which increased to 3.2 and 1,054 kJ mol{sup {minus}1}, respectively, in the secondary creep Effect of Ageing on Microstructure, Mechanical Properties Aug 12, 2020 · A study on the mechanical property changes and the creep behavior of a Ni-based alloy 740H on ageing at 800 °C for 10250 hours is conducted. Microstructural characterization reveals that the alloy initially contains fine phase and carbide precipitates within grains and at grain boundaries. Ageing does not affect the grain size but coarsens the phase and facilitates further

Effect of Prior-Heat Treatments on the Creep Behavior

The effect of prior-heat treatments at 500C, 600C and 700C on the creep behavior of an industrial drawn copper has been studied under constant stresses (98, 108 and 118 MPa) and temperatures (290C and 340C). The results revealed that the creep behavior and the creep life of the material depend strongly on these prior-heat treatments. Effect of Re on Long-Term Creep Behavior of Nickel-Based Aug 29, 2020 · Understanding the long-term creep behavior (creep lives longer than 5,000 h) of nickel-based single-crystal (SX) superalloys is of great interest for the service safety of industrial gas turbine Effect of creep aging parameters on creep resistance Dec 18, 2019 · The initial creep aging treatment has a great effect on creep resistance behavior of AlCuMg alloy. The growth of S phase leads to the softening of material and large creep strain. Furthermore, the S phase is more sensitive to the temperature than to the stress in the present experimental conditions.

Effects of Pre-Stretching on Creep Behavior, Mechanical

materials Article Effects of Pre-Stretching on Creep Behavior, Mechanical Property and Microstructure in Creep Aging of Al-Cu-Li Alloy Jin Zhang 1,3, Zhen Jiang 1, Fushun Xu 2,4,* and Mingan Chen 1 1 Light Alloy Research Institute, Central South University, Changsha 410083, China; [email protected] (J.Z.); [email protected] (Z.J.); [email protected] (M.C.) Effects of Temperature and Stress on Creep Behavior of PP Aug 22, 2019 · Reactive powder concrete (RPC) is an advanced cementitious material with ultra-high strength, remarkable durability and excellent toughness. However, temperature dependent creep is a major concern as very little work has been reported in the literature. Therefore, systematic investigations are still missing in state of the art. This paper focuses on the impact of Polypropylene (PP) and hybrid Influence of Ta content on microstructure and creep Dec 09, 2020 · This study investigated the influence of Ta content (i.e. 0 wt.%, 2 wt.%, and 4 wt.%) on microstructure and creep behavior of a Ni-Co base disc supera

Low temperature creep of titanium alloys:Microstructure

Primary creep is the dominant mode of deformation during ambient temperature creep in titanium alloys. In this study the mechanisms causing this unusual creep behavior have been investigated both at the phenomenological and at the microstructural level. The main focus of this work is on a single phase a titanium alloy, Ti-6wt%Al(Ti-6Al). Creep behavior of Ti-6Al-2Sn-4Zr-2Mo(Ti-6242) was also On the Effect of Nb on the Microstructure and Properties May 23, 2018 · The effect of Nb on the properties and microstructure of two novel powder metallurgy (P/M) Ni-based superalloys was evaluated, and the results critically compared with the Rolls-Royce alloy RR1000. The Nb-containing alloy was found to exhibit improved tensile and creep properties as well as superior oxidation resistance compared with both RR1000 and the Nb-free variant tested. The effect of sheet processing on the microstructure The grain size, grain boundary character distribution (GBCD), creep, and tensile behavior of INCONEL alloy 718 (IN 718) were characterized to identify processing-microstructure-property relationships. The alloy was sequentially cold rolled (CR) to 0, 10, 20, 30, 40, 60, and 80 pct followed by annealing at temperatures between 954 °C and 1050 °C and the traditional aging schedule used for

The effect of thermomechanical processing on the creep

The effect of thermomechanical processing on the microstructure and elevated-temperature creep behavior of Alloy 690 was investigated. Commercially available sheet was subjected to four cycles of cold rolling to 25% deformation followed by annealing at 1000 C for 1h. Zhan et al in Effect of Process Parameters on Fatigue and Zhan et al. in Effect of Process Parameters on Fatigue and Fracture Behavior of Al-Cu-Mg Alloy after Creep Aging [9].The aim of the study was to analyze the effects of different creep aging parameters on the creep behavior, mechanical properties, and fatigue fracture behavior of a widely used Al-Cu-Mg alloy in the aerospace industry in order to advance the development of creep aging Effect of initial temper on the creep behavior of a MgGd Sep 25, 2008 · In summary, the initial temper has great effect on the creep behavior of the alloy. A sigmoidal creep stage appears between primary and steady-state creep stage in the creep curves for specimens in unaged, underaged (250 °C/2 h) and peak-aged (250 °C/18 h) conditions.

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