Basic alloy development of low-transformation-temperature fillers for AISI 410 martensitic stainless steel

ABSTRACT

This study discusses the effect of Ni content of low-transformation-temperature (LTT) fillers on welding residual stresses of AISI 410 plates. The plates were joined by LTT fillers with 11 wt-% Cr and varying Ni from 3 to 11 wt-%. Evaluation of varying Ni content on the martensitic transformation temperature (M_s) by dilatometric tests indicates that the M_s of LTT fillers decreases from 335°C to 67°C by increasing Ni wt-%. Residual stress measurements show the highest compressive longitudinal stress (−310 MPa) in the weld bead deposited by the LTT filler contained 7 wt-% Ni and M_s= 202°C. This result is associated with the highest final expansion strain (0.37%) in this composition. Microstructural analyses show the presence of retained austenite by increasing the Ni more than 7 wt-%.

KEYWORDS:

• Low transformation-temperature filler
• welding residual stresses
• Ni content
• martensitic transformation
• GTAW

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

S. A. Hosseini http://orcid.org/0000-0002-9706-8276

N. Enzinger http://orcid.org/0000-0003-0051-9518

Additional information

Funding

Financial support provided by Shahid Chamran University of Ahvaz through the grant number SCU.EM98.222 is gratefully appreciated.