skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Weldability and joining techniques for advanced fossil energy system alloys

Abstract

The efforts represent the concerns for the basic understanding of the weldability and fabricability of the advanced high temperature alloys so necessary to affect increases in the efficiency of the next generation Fossil Energy Power Plants. The effort was divided into three tasks with the first effort dealing with the welding and fabrication behavior of 310HCbN (HR3C), the second task details the studies aimed at understanding the weldability of a newly developed 310TaN high temperature stainless (a modification of 310 stainless) and Task 3 addressed the cladding of austenitic tubing with Iron-Aluminide using the GTAW process. Task 1 consisted of microstructural studies on 310HCbN and the development of a Tube Weldability test which has applications to production welding techniques as well as laboratory weldability assessments. In addition, the evaluation of ex-service 310HCbN which showed fireside erosion and cracking at the attachment weld locations was conducted. Task 2 addressed the behavior of the newly developed 310 TaN modification of standard 310 stainless steel and showed that the weldability was excellent and that the sensitization potential was minimal for normal welding and fabrication conditions. The microstructural evolution during elevated temperature testing was characterized and the second phase particles evolved upon aging weremore » identified. Task 3 details the investigation undertaken to clad 310HCbN tubing with Iron Aluminide and developed welding conditions necessary to provide a crack free cladding. The work showed that both a preheat and a post-heat was necessary for crack free deposits and the effect of a third element on the cracking potential was defined together with the effect of the aluminum level for optimum weldability.« less

Authors:
; ; ; ; ;  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Sponsoring Org.:
USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
OSTI Identifier:
663407
Report Number(s):
ORNL/Sub-88-07685/05
ON: DE98006099; TRN: AHC29818%%244
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: May 1998
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HEAT RESISTING ALLOYS; WELDABILITY; STAINLESS STEEL-310; IRON BASE ALLOYS; ALUMINIUM ALLOYS; MICROSTRUCTURE; EROSION; CRACK PROPAGATION; HEAT AFFECTED ZONE; EXPERIMENTAL DATA

Citation Formats

Lundin, C D, Qiao, C Y.P., Liu, W, Yang, D, Zhou, G, and Morrison, M. Weldability and joining techniques for advanced fossil energy system alloys. United States: N. p., 1998. Web. doi:10.2172/663407.
Lundin, C D, Qiao, C Y.P., Liu, W, Yang, D, Zhou, G, & Morrison, M. Weldability and joining techniques for advanced fossil energy system alloys. United States. https://doi.org/10.2172/663407
Lundin, C D, Qiao, C Y.P., Liu, W, Yang, D, Zhou, G, and Morrison, M. 1998. "Weldability and joining techniques for advanced fossil energy system alloys". United States. https://doi.org/10.2172/663407. https://www.osti.gov/servlets/purl/663407.
@article{osti_663407,
title = {Weldability and joining techniques for advanced fossil energy system alloys},
author = {Lundin, C D and Qiao, C Y.P. and Liu, W and Yang, D and Zhou, G and Morrison, M},
abstractNote = {The efforts represent the concerns for the basic understanding of the weldability and fabricability of the advanced high temperature alloys so necessary to affect increases in the efficiency of the next generation Fossil Energy Power Plants. The effort was divided into three tasks with the first effort dealing with the welding and fabrication behavior of 310HCbN (HR3C), the second task details the studies aimed at understanding the weldability of a newly developed 310TaN high temperature stainless (a modification of 310 stainless) and Task 3 addressed the cladding of austenitic tubing with Iron-Aluminide using the GTAW process. Task 1 consisted of microstructural studies on 310HCbN and the development of a Tube Weldability test which has applications to production welding techniques as well as laboratory weldability assessments. In addition, the evaluation of ex-service 310HCbN which showed fireside erosion and cracking at the attachment weld locations was conducted. Task 2 addressed the behavior of the newly developed 310 TaN modification of standard 310 stainless steel and showed that the weldability was excellent and that the sensitization potential was minimal for normal welding and fabrication conditions. The microstructural evolution during elevated temperature testing was characterized and the second phase particles evolved upon aging were identified. Task 3 details the investigation undertaken to clad 310HCbN tubing with Iron Aluminide and developed welding conditions necessary to provide a crack free cladding. The work showed that both a preheat and a post-heat was necessary for crack free deposits and the effect of a third element on the cracking potential was defined together with the effect of the aluminum level for optimum weldability.},
doi = {10.2172/663407},
url = {https://www.osti.gov/biblio/663407}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri May 01 00:00:00 EDT 1998},
month = {Fri May 01 00:00:00 EDT 1998}
}