Static strain ageing behaviour of dual phase steels

The influence of temperatures and strain rates on the mechanical behavior of dual phase steel in different conditions

“…2a can be explained as an aging effect at ambient temperature which is less effective and caused mainly by Cottrell atmospheres. It has been reported that a clear yielding point occurs after aging in air only for 30 min in microalloyed dual phase steels [12]. The presence of fine C-rich clusters with sizes ranging from 0.7 to 2.5 nm was detected by atom probe tomography in the martensite after 4% prestraining before bake hardening [11].…”

Strain Aging Behavior of Microalloyed Low Carbon Seamless Pipeline Steel

“…more attention from scientists and steel industries, particularly for the strain-based design applications. [4][5][6][7][8] Compared with welded pipe, seamless pipe has been increasingly applied for oil transportation in severe environment, for example the marine environment, due to the homogeneity of mechanical property without welded joints. At present, increasing demand for strain aging design of seamless pipe has been needed for steel industries.…”

Factors Affecting Kinetics of Strain Aging in S275JRC Steel

“…The increase in flow stress as a result of restraining was taken as the strain ageing, ΔY 2 , which is illustrated in Figure 3. For samples, pre-strained in tension, ΔY 2 was determined with single specimen by the difference between lower yield stress after ageing and the flow stress at the end of the pre-straining 16,17 . In this study, ΔY 2 is an increase in the yield strength due to strain aging.…”

“…These structural mild steels are generally preferred in civil engineering and industry of machinery manufacturing 9 . Remarkable researches have been carried out on the strain aging of ultra-low carbon, interstitial free; bake hardenable, dual phase and various stainless steel [9][10][11][12][13][14][15][16][17][18] . As relatively inconclusive study is available in the literature, a work is needed to investigate the materials and processing factors that are significant parameters affecting the kinetics of strain ageing of S275JRC steel which is preferred for manufacturing heavy vehicle steel wheel rim.…”