Optimization of strength of friction stir welded joints for AISI 430 ferritic stainless steels by genetic algorithm

2014 ◽  
Vol 77 (9-12) ◽  
pp. 2221-2233 ◽  
Author(s):  
Mehmet Burak Bilgin ◽  
Cemal Meran ◽  
Olcay Ersel Canyurt
Keyword(s):  
Genetic Algorithm ◽  
Stainless Steels ◽  
Welded Joints ◽  
Ferritic Stainless Steels ◽  
Friction Stir ◽  
Aisi 430

A New Electrochemical Potentiokinetic Reactivation Test for Determining Degree of Sensitization in Ferritic Stainless Steels

CORROSION ◽  
1986 ◽  
Vol 42 (2) ◽  
pp. 106-110 ◽  
Author(s):  
J. B. Lee
Keyword(s):  
Stainless Steels ◽  
Open Circuit Potential ◽  
Immersion Test ◽  
Open Circuit ◽  
H2so4 Solution ◽  
Ferritic Stainless Steels ◽  
Degree Of Sensitization ◽  
Electrochemical Potentiokinetic Reactivation ◽  
Epr Test ◽  
Aisi 430

Abstract An electrochemical potentiokinetic reactivation (EPR) test has been developed for quantifying the degree of sensitization of ferritic stainless steels (SSs). This test is applicable to AISI 430, 430 Ti, 430 Nb, 434, 444, and 446. The test is conducted at 30 C in a deaerated 3 to 5 N H2SO4 solution. A test specimen is first passivated at + 400 mVSCE for 2 to 10 min, depending on the grade of SS, and then subjected to a reactivation step where the potential is decreased at a rate of 100 to 250 mV/min toward the open circuit potential (OCP) to determine whether a reactivation peak occurs. Results of the EPR test agree well with those of the Cu-CuSO4-50% H2SO4 immersion test.

Friction stir spot welded joints of 409L stainless steels fabricated by a convex shoulder tool

2013 ◽  
Vol 19 (6) ◽  
pp. 1243-1250 ◽  
Author(s):  
Md. Abu Mowazzem Hossain ◽  
Md. Tariqul Hasan ◽  
Sung-Tae Hong ◽  
Michael Miles ◽  
Hoon-Hwe Cho ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Welded Joints ◽  
Friction Stir ◽  
Spot Welded
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