Browse Publications Technical Papers 2000-01-2699

Effects of Alloying Elements on Mechanical Properties and Phase Transformation of TRIP Cold Rolled Steel Sheets 2000-01-2699

Tensile and dilatation tests were conducted in order to study the effects of Mn, Si and Nb on the transformation behavior in the 0.14C - (2.1∼2.4)Mn - (0.5∼1.0)Si (0.00∼0.02)Nb TRIP steels. The volume fraction of bainite transformed during austempering, ΔVB, and the martensite start temperature, Ms, were measured. ΔVB was dependent on the austempering temperature and a minimum in ΔVB was obtained at 450°C for all the examined steels. Ms temperature was linearly decreased as ΔVB was increased. The ratio of Ms decrease to ΔVB was not dependent on the composition of steels, but on the austempering temperature, exhibiting a maximum when the austempering temperature was 450°C. It was also observed that elongation was the greatest when the ratio was maximum. Ms was increased when the amount of Mn was increased from 2.1% to 2.4%. It was because Mn retarded the ferrite transformation rate so that the soluble C diffused from the ferrite to the austenite was decreased. The addition of Si decreased Ms because it activated the diffusion of C to austenite during the cooling to the austempering temperature. The addition of Nb was observed to give little influence on ΔVB and the Ms.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.

Due to current capacity constraints, printed versions of our publications - including standards, technical papers, EDGE Reports, scholarly journal articles, books, and paint chips - may experience shipping delays of up to four to six weeks. We apologize for any inconvenience.
We also recommend:

Technological Comparison for Dual Phase and Advanced High Strength Low Alloy Steels Regarding Weldability and Mechanical Properties


View Details


Tolerances Carbon and Alloy Steel Tubing


View Details


Steel, Corrosion Resistant, Bars and Wire 18Cr - 9.0Ni (302) Solution Heat Treated, Cold Drawn and Stress Relieved 125 ksi (862 MPa) Tensile Strength


View Details