نتایج جستجو برای: precipitation hardening

تعداد نتایج: 69207  

Creep age forming (CAF) process is a novel metal forming method with major benefits including improved mechanical properties and cost reduction for aviation industry applications. CAF happens due to creep phenomenon and stress-release during the artificial aging of heat-treatable  aluminum alloys. In this work, the creep age forming of 7075 Aluminum alloy at 120, 150 and 180 °C for 6, 24 and 48...

The 17-4PH alloy is a martensitic stainless steel with 3–5 wt% Cu, strengthened by the precipitation hardening. Due to excellent mechanical properties, corrosion resistance and ease of heat treatment, this alloy has unique applications in nuclear power plants and marine constructions. In this paper, the influence of ageing heat treatment, solution annealing followed by ageing at 480, 550 and 62...

Journal: :Materials Science and Engineering A-structural Materials Properties Microstructure and Processing 2021

The effects of natural aging (NA), and its combination with pre-aging (PA), on the strength electrical conductivity (EC) drawn Al–Mg–Si AA6201 conductor alloys were studied. Natural had a negative impact precipitation before drawing process. However, wire counteracted detrimental influence hardening; after post-aging, NA samples exhibited better EC compared to those that did not undergo NA. Tra...

2001
E. ØSTBY Z. L. ZHANG C. THAULOW

The change in near-tip stress field in Small Scale Yielding (SSY) for cracks located at an interface between two materials with different plastic work hardening is investigated. The difference in hardening is termed hardening mismatch, and is quantified through the parameter n, which is the difference in hardening exponent between the two materials. For cracks in elastic-ideally plastic materia...

Journal: :Tree physiology 2004
Pedro Villar-Salvador Rosa Planelles Juan Oliet Juan L Peñuelas-Rubira Douglass F Jacobs Magdalena González

Drought stress is the main cause of mortality of holm oak (Quercus ilex L.) seedlings in forest plantations. We therefore assessed if drought hardening, applied in the nursery at the end of the growing season, enhanced the drought tolerance and transplanting performance of holm oak seedlings. Seedlings were subjected to three drought hardening intensities (low, moderate and severe) for 2.5 and ...

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