Results 51 to 60 of about 138 (124)

Decoupling early-stage cracking and propagation mechanisms in liquid metal embrittlement of Zn-galvanised TWIP steel

Journal of Materials Research and Technology
Liquid metal embrittlement (LME) presents a major barrier to the widespread adoption of advanced high-strength steels in automotive applications. Despite extensive research, decoupling its early-stage cracking and propagation micromechanisms remains ...
Virgínia Bertolo, Gautham Mahadevan, René de Kloe, Roumen H. Petrov, Vera Popovich   +4 more
doaj   +1 more source

Comparative Study on the Liquid Metal Embrittlement Susceptibility of the High-Si Advanced High-Strength Steel with EG and GA Zn Coatings

Metals
The Zn-coated high-Si advanced high-strength steel (AHSS) tends to suffer Zn-assisted liquid metal embrittlement (LME) during the resistance spot welding (RSW) process. In this study, the LME behaviors of electrogalvanized (EG) and galvannealed (GA) high-
Jingyi Gu, Jiayi Zhou, Rongxun Hu, Yu Sun, Ming Lei, Yulai Gao   +5 more
doaj   +1 more source

Insight into grain boundaries with reduced liquid metal embrittlement susceptibility in a boron-added 3rd generation advanced high strength steel

Materials & Design
The addition of boron to the advanced high-strength steels (AHSS) enhances grain boundary cohesion and can play a significant role in intergranular degradation phenomena such as Zn-assisted liquid metal embrittlement (LME). The objective of this study is
Elahe Akbari, Philipp Kürnsteiner, Katharina Steineder, Martin Gruber, Martin Arndt, Ilse Letofsky-Papst, Robert Sierlinger, Heiko Groiss   +7 more
doaj   +1 more source

Understanding Zn-assisted liquid metal embrittlement in resistance spot welding of Zn-coated TRIP steel sheets: Effects of Si and Al on Fe–Zn reactions

Journal of Materials Research and Technology
High-strength transformation-induced plasticity (TRIP) steels have been widely used in the automotive industry owing to their excellent mechanical properties and superior weldability.
Seok-Hyun Hong, Sunghak Lee, Sung-Joon Kim   +2 more
doaj   +1 more source

Mechanistic Insights into LME Crack-Induced High-Cycle Fatigue Degradation in Zn-Coated High-Strength Boron Steel

Metals
Liquid metal embrittlement (LME) during hot stamping of Zn-coated high-strength steels poses significant challenges to the long-term durability of automotive components. This study investigates how ~30 μm deep LME cracks affect the mechanical behavior of
Shaotai Feng, Ning Tan, Jianyu Zhang, Xiaodeng Wang, Ping Bao, Hongxing Zheng   +5 more
doaj   +1 more source

Influence of liquid metal embrittlement on the failure behavior of dissimilar spot welds with advanced high-strength steel: A component study

Journal of Materials Research and Technology
This study investigates the effects of liquid metal embrittlement (LME) cracks on the mechanical performance of resistance spot-welded joints in zinc-coated advanced high-strength steel (AHSS) at the component level.
Keke Yang, Matthias Sowada, Viktoria Olfert, Georg Seitz, Vincent Schreiber, Marcel Heitmann, David Hein, Max Biegler, Sven Jüttner, Michael Rethmeier, Gerson Meschut   +10 more
doaj   +1 more source

Mechanisms for mitigating liquid metal embrittlement via surface decarburization in Zn-coated advanced high-strength steels

Journal of Materials Research and Technology
Third-generation advanced high-strength steels (AHSS 3. Gen.) have been developed to improve lightweight design and safety in automotive applications. Their superior strength–ductility balance originates from retained austenite stabilized by Si. However,
Hyungkwon Park, Seong Hoon Kim, Jin-Jong Lee, Kyeong-Won Kim, Chang-Hoon Lee, Tejaswin Krishna, Yeong-Do Park, Min-Ho Jang, Min-Seo Park, Seong-Kyung Han, Tae-Ho Lee   +10 more
doaj   +1 more source

Resistance spot welding of DH1200 using short pulses and high currents: Effects on nugget size, microstructure, hardness, liquid metal embrittlement, and tensile shear strength

International Journal of Lightweight Materials and Manufacture
This study investigates short-pulse high-current resistance spot welding (RSW) of DH1200, a third-generation advanced high-strength steel (AHSS) critical to lightweight automotive structures.
Saeed Shiri, Holger Schubert, Benjamin Hilpert, Luke N. Brewer   +3 more
doaj   +1 more source

Effect of Pb, Bi and alloying elements on bonding properties and fracture toughness of FCC Fe ∑3(111)[11‾0] grain boundary

Nuclear Engineering and Technology
In accelerator-driven nuclear systems, the compatibility of liquid lead-bismuth eutectic (LBE) with austenitic (FCC Fe based) stainless steel is critical.
Wenyan Liang, Rumeng Wen, Zhe Liu, Lingyun Yang, Lei Sun, Xing Gong, Chaoping Liang   +6 more
doaj   +1 more source

Liquid metal embrittlement during FAST joining of magnesium and galvanized steel

Journal of Magnesium and Alloys
Joining magnesium (Mg) alloys to steel is difficult due to metallurgical incompatibility. Applying a zinc (Zn) coating to steel enables formation of a thin Mg-Zn eutectic phase layer during welding, which promotes strong bonding.
Tianhao Wang, Piyush Upadhyay, Hrishikesh Das, Fu-Yun Tsai, Bharat Gwalani   +4 more
doaj   +1 more source