Effects of GBCD on cold work embrittlement of high strength interstitial free steels

2006 ◽  
Vol 27 (1) ◽  
pp. 53-57 ◽  
Author(s):  
S.Q. Cao ◽  
J.X. Zhang ◽  
J.S. Wu ◽  
J.G. Chen
Keyword(s):  
Cold Work ◽  
High Strength ◽  
Interstitial Free

THE NEW COLD-WORK PEAKS IN LOW CARBON AND INTERSTITIAL-FREE STEELS

1987 ◽  
Vol 48 (C8) ◽  
pp. C8-149-C8-154
Author(s):  
H. B. CHEN ◽  
T. S. CHOU
Keyword(s):  
Cold Work ◽  
Interstitial Free ◽  
Low Carbon

TELNIC BRONZE

Alloy Digest ◽  
1953 ◽  
Vol 2 (1) ◽  
Keyword(s):  
Heat Treatment ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Base Alloy ◽  
Cold Work ◽  
High Strength ◽  
Heat Treating ◽  
Hot Workability ◽  
Copper Base ◽  
Copper Base Alloy

Abstract Chase TELNIC BRONZE is a high strength copper-base alloy, hardenable both by heat treatment and cold work, and also having good conductivity, corrosion resistance, cold and hot workability, and excellent machinability. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: Cu-4. Producer or source: Chase Brass & Copper Company Inc..

Experimental investigation on resistance spot welding of dissimilar weld joints

2020 ◽  
pp. 095440892096835
Author(s):  
Rohit Verma ◽  
Kanwer Singh Arora ◽  
Lochan Sharma ◽  
Rahul Chhibber
Keyword(s):  
Welding Process ◽  
High Strength ◽  
Dynamic Resistance ◽  
Interstitial Free ◽  
Resistance Spot ◽  
Dissimilar Weld ◽  
Steel Sheets ◽  
Weld Joints ◽  
Resistance Spot Weld ◽  
Weld Current

In the present study, galvanized High Strength Interstitial Free (HIF) steel sheets, and Dual Phase (DP780) steel sheets were used for the investigations. Resistance spot weld joints were fabricated between dissimilar steel sheets. The variation in dynamic resistance (DR) with the change in welding process parameters such as weld current, weld time and electrode force were used for establishing the range of adequate weld nugget formation parameters. Effect of these parameters over tensile strength, nugget diameter and the observed failure mode was studied using one factor at a time (OFAT) approach. Microstructure and hardness of parent metal, fusion & HAZ region has also been studied.

scholarly journals Effect of Rare Earth Ce on Deep Stamping Properties of High-Strength Interstitial-Free Steel Containing Phosphorus

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1473
Author(s):  
Hao Wang ◽  
Yanping Bao ◽  
Chengyi Duan ◽  
Lu Lu ◽  
Yan Liu ◽  
...  
Keyword(s):  
Solid Solution ◽  
Grain Size ◽  
Rare Earth ◽  
High Strength ◽  
Rolling Process ◽  
P Element ◽  
Second Phase ◽  
Strengthening Effect ◽  
Interstitial Free ◽  
If Steel

The influence of rare earth Ce on the deep stamping property of high-strength interstitial-free (IF) steel containing phosphorus was analyzed. After adding 120 kg ferrocerium alloy (Ce content is 10%) in the steel, the inclusion statistics and the two-dimensional morphology of the samples in the direction of 1/4 thickness of slab and each rolling process were observed and compared by scanning electron microscope (SEM). After the samples in each rolling process were treated by acid leaching, the three-dimensional morphology and components of the second phase precipitates were observed by SEM and energy dispersive spectrometer (EDS). The microstructure of the sample was observed by optical microscope, and the grain size was compared. Meanwhile, the content and strength of the favorable texture were analyzed by X-ray diffraction (XRD). Finally, the mechanical properties of the product were analyzed. The results showed that: (1) The combination of rare earth Ce with activity O and S in steel had lower Gibbs free energy, and it was easy to generate CeAlO3, Ce2O2S, and Ce2O3. The inclusions size was obviously reduced, but the number of inclusions was increased after adding rare earth. The morphology of inclusions changed from chain and strip to spherical. The size of rare earth inclusions was mostly about 2–5 μm, distributed and dispersed, and their elastic modulus was close to that of steel matrix, which was conducive to improving the structure continuity of steel. (2) The rare earth compound had a high melting point. As a heterogeneous nucleation point, the nucleation rate was increased and the solidification structure was refined. The grade of grain size of products was increased by 1.5 grades, which is helpful to improve the strength and plasticity of metal. (3) Rare earth Ce can inhibit the segregation of P element at the grain boundary and the precipitation of Fe(Nb+Ti)P phase. It can effectively increase the solid solution amount of P element in steel, improve the solid solution strengthening effect of P element in high-strength IF steel, and obtain a large proportion of {111} favorable texture, which is conducive to improving the stamping formability index r90 value.

Third Order Elastic Constants and Rayleigh Wave Dispersion of Shot Peened Aero-Engine Materials

2013 ◽  
Vol 768-769 ◽  
pp. 201-208 ◽  
Author(s):  
Marek Rjelka ◽  
Martin Barth ◽  
Sven Reinert ◽  
Bernd Koehler ◽  
Joachim Bamberg ◽  
...  
Keyword(s):  
Residual Stress ◽  
Rayleigh Wave ◽  
Elastic Constants ◽  
Cold Work ◽  
High Strength ◽  
Wave Dispersion ◽  
Third Order ◽  
Third Order Elastic Constants ◽  
Aero Engine ◽  
Rayleigh Wave Dispersion

Aero-engine components exposed to high mechanical stresses are made of high-strength alloys and additionally, they are surface treated by shot peening. This process introduces compressive residual stress into the material making it less sensitive to stress corrosion cracking and fatigue and therefore benefits the components performance and lifetime. Moreover cold work is induced in an amount depending on the peening parameters. To approximate the remaining lifetime, a quantitative, non-destructive method for stress assessment is required. It was shown that surface treatment of such alloys can be characterized by broadband Rayleigh wave dispersion measurements. However, the relative contributions of residual stress and cold work, respectively, remained an open point. This paper presents the determination of third order elastic constants (TOEC) for IN718 and Ti6246, providing, together with a model for the inversion of dispersion data, a quantitative access to the acoustoelastic effect. Finally, some measurements of differently treated samples are given.

DEUTSCHE EDELSTAHLWERKE CRYODUR 2242

Alloy Digest ◽  
2021 ◽  
Vol 70 (8) ◽  
Keyword(s):  
Wear Resistance ◽  
Physical Properties ◽  
Cold Work ◽  
High Strength ◽  
Heat Treating ◽  
Vanadium Alloy ◽  
Medium Carbon ◽  
High Toughness ◽  
Specialty Steel ◽  
Cold Work Tool Steel

Abstract Deutsche Edelstahlwerke Cryodur 2242 is a medium-carbon, chromium-vanadium alloy cold-work tool steel that has medium hardenability and is suitable for applications requiring a combination of high strength, high toughness, and good wear resistance. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, and machining. Filing Code: TS-816. Producer or source: Deutsche Edelstahlwerke Specialty Steel.

New high-strength, corrosion-resistant alloys for marine corrosion, fastener and boat shaft applications

2012 ◽  
Author(s):  
Edward Hibner ◽  
Pete Jones
Keyword(s):  
Corrosion Resistance ◽  
Hydrogen Embrittlement ◽  
Yield Strength ◽  
Cold Work ◽  
High Strength ◽  
Age Hardening ◽  
Marine Corrosion ◽  
Corrosion Resistant ◽  
Excellent Corrosion Resistance ◽  
Cold Worked

High strength and corrosion resistant nickel alloys Hastelloy C-86 ® (UNS N06686) and Hastelloy C-22HS ® (UNS N07022) are currently being evaluated and/ or used by the Navy for current and future bolting applications where both high strength, toughness, ductility along with excellent resistance to corrosion and hydrogen embrittlement are required. This includes present and new ship design. The 686 alloy is currently into final stages of data gathering and mil spec preparation. Alloy 686 is a solid solution nickel base alloy obtaining it’s strength through cold work. The C-22HS alloy was recently introduced for applications requiring both corrosion resistance and high strength. Being a C-type alloy (Ni-Cr-Mo), C- 22HS has excellent corrosion resistance in both reducing and oxidizing environments. The alloy is capable of being age-hardened to effectively double the yield strength over other Ctype alloys. The C-22HS alloy has generated interest in the oil & gas industry due to its resistance to sour brine environments. C-22HS is being included in NACE MR0175/ISO 15156 at NACE Level VII (highest severity), exhibiting resistance to severe sour brine environments. Properties of the new alloy relevant to marine corrosion and Navy fastener applications are presented. This material has also been shown to be resistant to hydrogen embrittlement in marine and other severe environments, exhibiting potential for corrosion immunity. Efforts in developing alternate processing routes for C-22HS alloy for very high strength applications are detailed. The high strength of C-22HS alloy is imparted through the formation of Long Range Ordering (LRO) domains of Ni2(Cr, Mo) which develop during a two-step age-hardening treatment. In standard C-22HS alloy, the formation of the LRO domains nearly doubling of the room temperature yield strength up to values around 100 ksi. The yield strengths of the as-cold worked bars ranged from 191 to 205 ksi (1317 to 1413 MPa), and the cold-worked + age-hardened bars ranged from 199 to 206 ksi (1372 to 1420 MPa). In these material conditions, C-22HS also exhibits excellent ductility and fracture toughness of _150 ft-lbs (_203 J) from -300ºF to +550ºF (-149 to 288°C). The C - 22HS alloy is presently being tested for Navy Subsafe high strength fastener approval. An important feature of the C-22HS alloy in the age-hardened condition is that the alloy retains excellent corrosion resistance. Both alloys C-86 and C-22HS have excellent potential for all marine and military applications where excellent strength, toughness and corrosion resistance are required. In addition to the nickel alloy just discussed, NITRONIC® 50HS (UNS S20910) Stainless Steel provides a combination of corrosion resistance and strength not found in any other commercial material available in its price range. As a result, the use of this alloy for boat shafting is significantly increasing for commercial and naval shipping. Superior corrosion resistance, high yield strength, exceptionally low magnetic permeability and outstanding cryogenic properties define this alloy usefulness for boat shafting.

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