Joining & Welding
AHSS Joining (TRAINING) – Affecting the application of Advanced High-Strength Steels to part of a vehicle are considerations for Steel Chemistry, Effects of Galvanized Coating, Effects of Process Parameters, Carbon Equivalent, and Liquid Metal Embrittlement (LME). This course will discuss how to address these topics. > Links to A/SP Training page: https://www.a-sp.org/training/
Die Weld Repair Procedures (TRAINING) – A/SP has developed a series of OEM weld repair procedures for common stamping die materials. Each procedure is specific to the stamping process and repair issue. Procedures were created from OEM auto manufacturer input are intended to help in repair and restoration of stamping dies. > Located on A/SP Training page: https://www.a-sp.org/training/
AHSS Guidelines (TRAINING) – The AHSS Guidelines provide global best practices for forming and joining AHSS and 3rd Gen Steels, click here for a downloadable copy. The guidelines available through WorldAutoSteel enable those who are making automotive structures to master the fundamentals and get up to speed on specific application knowledge. Automotive designers, engineers and press shop personnel can all benefit from the Guidelines as they apply these steels to vehicle manufacturing. > Located on A/SP Training page: https://www.a-sp.org/training/
Mixed Material Joining – A/SP Research Results – AISI Webinar (RECORDING & PRESENTATION) – presented by Bryan Macek, Senior Technical Specialist FCA US LLC on behalf of A/SP. This informative presentation discusses the A/SP project designed to enable OEMs to leverage the full spectrum of structural materials to meet aggressive mass targets without impacting vehicle safety and durability. This A/SP research help OEMs characterize the performance of multiple joining technologies that can be used to integrate alternate structural materials in steel intensive executions in high volume production scenarios. > Links to AISI Auto Resource Page: https://www.steel.org/steel-markets/automotive/joining-webinar
Rapid Measurement of Liquid Metal Embrittlement – A/SP Research Results – AISI Webinar (RECORDING & PRESENTATION | PROCEDURE) – presented by Michael Karagoulis, Ph.D., Master Mechanic – Weld Development, Global ME Body-in-White, General Motors Corporation, on behalf of A/SP. A/SP has been working collaboratively between automotive OEMs, Tier 1 suppliers and steel manufacturers to develop rapid evaluation and measurement procedures to help the industry overcome the challenge of Liquid Metal Embrittlement (LME). LME can impact various weld types across a variety of materials. Collaborative development of rapid evaluation procedures looked specifically at weld cracking of galvanized advanced high strength steels, helping to speed validation and use of certain AHSS and 3rd Gen steel grades. > Links to AISI Auto Resource Page: https://www.steel.org/steel-markets/automotive/liquid-metal-research-webinar.
In 2023, A/SP released two new test procedures, LP2.1 Gleeble Based Test Procedure and ASP LP3.1 Rapid LME Test Procedure, which were instrumental in enabling the A/SP Joining Team to move from assessing LME susceptibility to developing strategies to mitigate the potential for LME cracking in automotive joints using 3rd Gen AHSS. Furthermore, the Team is convinced that the results from the early LME testing were instrumental in leading to improvements in 3rd Gen AHSS formulations that are more resistant to LME cracking. Rapid improvements in resistance to LME cracking were observed from vendors whose initial submissions performed poorly but later submissions were remarkably improved. Read an article, entitled Liquid Metal Embrittlement Test Procedures, summarizes the work and findings that led to these test procedures, and provides links to download them for use and further research.
- Addressing Stamping & Joining Challenges of Advanced High Strength Steel Through Auto/Steel Partnership; Hassan Ghassemi-Armaki, JP Singh, Michael Davenport, Materials in Car Body Engineering,. September 2020 Bad Nauheim, Germany
- LME Evaluation of 3rd Gen Advanced High Strength Sheet Steels, Hassan Ghassemi-Armaki et al., Joining in Car Body Engineering,. Feb 2020, MI USA
- A Generalized Stress Parameter Approach for Fatigue Life Prediction of Welded Joints Dr. Hong-Tae Kang – Univ. of Michigan, Dearborn on behalf of the Auto/Steel Partnership (GDIS 2019)
- Gas Metal Arc Welding of AHSS – Min Kuo – ArcelorMittal on behalf of the Auto/Steel Partnership (GDIS 2019)
- LME Gleeble-Based Testing Procedure: 2018 Ohio State University & Auto/Steel Partnership; Austin Gordon, Caleb Llaneza, Dr. Antonio Ramirez, Joe Jaskowiak, Dillon Randolph, Dr Michael Karagoulis, Dr. Hassan Ghassemi-Armaki
- Gas Metal Arc Brazing and Welding of Advanced High Strength Steels – Mike Palko – Auto/Steel Partnership – Ford Motor Company (GDIS 2018)
- Brazing and Arc Welding of Advanced High-Strength Steels – 5/22/2017 – Min Kuo – ArcelorMittal on behalf of A/SP
- Joint Efficiency Phase II – Executive Summary – 12/7/2009 – To study the effects of joining processes on AHSS, tensile test data was generated to calculate joint efficiency, energy, and stiffness for a range of steels.
- AHSS Joining – Weld Bond Adhesive Guidelines – 9/1/2008 – Provide design info for A/SP projects, body structure design engineers and for modeling engineers working on BIW designs utilizing adhesives
- AHSS Joining – Weld Schedule – 9/1/2008 – Determines whether existing AC and DC weld schedules were suitable for AHSS classified as IISI group 3 and 4 materials
- GMAW Weld Design Guidelines for Chassis Structures – 7/1/2008 – OEM arc welding design standards were compared/evaluated to identify design rules applicable to chassis-related A/SP Lightweighting Projects.
- Advanced High-Strength Steel Weld Performance Study for Autobody Structural Components – 3/1/2007
- An Investigation of Resistance Welding Performance of Advanced High-Strength Steels – 3/1/2007
- AHSS Joining – Temperature Effect on Impact Performance of AHSS Welds – 3/1/2007 – A study conducting the effect of temperatures on the behavior of AHSS resistance spot welds, under impact loading conditions
- Lightweight Chassis Structures – Light Truck Frame Joint Stiffness Study Phase 1 Final Report – 7/1/2001 – This report comprises the results of Phase 1, the modeling and testing of five joints typically used in light truck frames
- AHSS Joining – Operating Procedures for Conducting the A-SP DOE of Coated Steels – 7/30/1999 – A summary identifying factors which have the greatest influence on the variance of weld size/shape during a standard electrode life test
- AHSS Joining – High_Strength_Steel_Weldability_DOE_Test_Method_Correlation – 12/2/1998 – Test method correlation study to compare A/SP weld quality endurance test method top current automotive resistance welding test procedures
- AHSS Joining – Finite_Element_Modelling_Of_Electrode_Wear_Mechanisms – 4/10/1995 – A study that demonstrates the effectiveness of the finite-element modeling techniques
- AHSS Joining – Resistance Spot Weld Schedules for AHSS – Determines whether existing AC and DC weld schedules were suitable for AHSS classified as IISI group 3 and 4 materials
- AHSS Joining – Weld Lobe Development & Assessment of Weldability of Common Automotive Fastners – Assesses Weldability and Develops Weld Lobes for Common Automotive Studs and Nuts Welded to AHSS by Utilizing the Drawn Arc Welding Process