scholarly journals On the Improvement of the Mechanical Properties of 21-4N Valve Steel by Double Aging

1966 ◽  
Vol 15 (148) ◽  
pp. 10-16
Author(s):  
Takuro SAGA ◽  
Omi MIYAKAWA ◽  
Tamihiko AIHARA ◽  
Kunio SUEYOSHI
Keyword(s):  
Mechanical Properties ◽  
Double Aging ◽  
Valve Steel

scholarly journals Effect of Heat Treatment on the Mechanical Properties of 21-4N Valve Steel

1965 ◽  
Vol 14 (142) ◽  
pp. 549-556
Author(s):  
Takuro SAGA ◽  
Omi MIYAKAWA ◽  
Tamihiko AIHARA ◽  
Kunio SUEYOSHI
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Valve Steel

Effect of Niobium Content on Laminar Precipitate and High Temperature Mechanical Properties of 21-2N Valve Steel

2010 ◽  
Vol 654-656 ◽  
pp. 182-185
Author(s):  
Shi Chang Cheng ◽  
Zheng Dong Liu ◽  
Zhao Jie Lin ◽  
Han Sheng Bao
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
High Temperature ◽  
Rupture Strength ◽  
Solution Treatment ◽  
Creep Rupture Strength ◽  
Niobium Content ◽  
High Temperature Mechanical Properties ◽  
Solid Solution Treatment ◽  
Valve Steel

Effect of niobium content on laminar precipitate and high temperature mechanical properties of 21-2N vavle steel was systematically studied, using specimens contain 0.26%, 0.43%, 0.65% 0.82% and 1.06% Nb. After different solid solution treatment and 750 °C aging heat treatment, experimental results showed that laminar precipitate was suppressed by niobium addition, and with the increasing of niobium content, laminar precipitate content decreased and size, distribution and morphology of laminar precipitate was meliorated. Then creep rupture strength and fatigue strength of experimental steels are improved with increasing of niobium.

scholarly journals Effect of double aging on mechanical properties and microstructure of EV31A alloy

2021 ◽  
Vol 31 (9) ◽  
pp. 2606-2614
Author(s):  
Kan GU ◽  
Xiao-qin ZENG ◽  
Bin CHEN ◽  
Ying-xin WANG
Keyword(s):  
Mechanical Properties ◽  
Double Aging

Phase Transformations in Ti-7w/oMo-3w/oMe Alloy

1974 ◽  
Vol 32 ◽  
pp. 514-515
Author(s):  
S. Fujishiro
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Transmission Electron Microscopy ◽  
Tensile Strength ◽  
Mechanical Processing ◽  
Ray Method ◽  
X Ray ◽  
Transmission Electron ◽  
Water Quench ◽  
Alpha Beta

The mechanical properties of three titanium alloys (Ti-7Mo-3Al, Ti-7Mo- 3Cu and Ti-7Mo-3Ta) were evaluated as function of: 1) Solutionizing in the beta field and aging, 2) Thermal Mechanical Processing in the beta field and aging, 3) Solutionizing in the alpha + beta field and aging. The samples were isothermally aged in the temperature range 300° to 700*C for 4 to 24 hours, followed by a water quench. Transmission electron microscopy and X-ray method were used to identify the phase formed. All three alloys solutionized at 1050°C (beta field) transformed to martensitic alpha (alpha prime) upon being water quenched. Despite this heavily strained alpha prime, which is characterized by microtwins the tensile strength of the as-quenched alloys is relatively low and the elongation is as high as 30%.

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