Enhanced mechanical properties of a hot stamped advanced high-strength steel treated by quenching and partitioning process

Li, Heping; Lu, Xianwen; Jin, Xianglin; Han, Dong; Shi, Jie

doi:10.1016/j.scriptamat.2010.12.037

Cited by 153 publications

(64 citation statements)

References 14 publications

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“…Residual ductility of press hardened parts (in service) is limited, and Q&P processing has been investigated in a hot stamping context to enhance tensile ductility of formed parts with encouraging results. 56,91 Application of Q&P to other sheet steel product areas such as hot rolled carbon 92 and stainless steel [41][42][43]93 also remain fruitful focus areas. Coil cooling may be employed in the hot strip mill to obtain carbon partitioning, 92 following controlled run-out table cooling and coiling.…”

Section: Mechanical Behaviourmentioning

confidence: 99%

Critical Assessment 7: Quenching and partitioning

Speer

Moor

Clarke

2015

Materials Science and Technology

136

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Quenching and partitioning is a relatively new heat treatment concept to generate microstructures containing retained austenite stabilised by carbon partitioning from martensite. Research on quench and partitioning has been conducted by numerous groups, and this critical assessment provides some of the authors’ perspectives on progress and understanding in the field, with particular focus on the physical metallurgy and transformation mechanisms, process variations, mechanical behaviour, and industrial implementation. While much progress has been made, the field provides rich opportunity for further understanding and development.

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Section: Mechanical Behaviourmentioning

confidence: 99%

Critical Assessment 7: Quenching and partitioning

Speer

Moor

Clarke

2015

Materials Science and Technology

136

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“…The micro-tensile test [25][26][27] specimens were wire-cut according to Figure 4 from the TMCP treated samples and tensile tested on an Inspekt Table tensile testing machine at room temperature with a cross-head speed of 0.25 mm·min −1 . For each simulated process, three tensile samples were tested, and the yield strength was determined by the 0.2% offset flow stress.…”

Section: Experimental Materials and Proceduresmentioning

confidence: 99%

Effect of Finish Rolling Temperature on the Microstructure and Tensile Properties of Nb–Ti Microalloyed X90 Pipeline Steel

Guo

Fan

Wang

et al. 2016

Metals

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Abstract:The relationship between microstructure and tensile properties of an Nb-Ti microalloyed X90 pipeline steel was studied as a function of finish rolling temperature using a Gleeble 3500 simulator, an optical and scanning electron microscope, electron back scattered diffraction (EBSD), a transmission electron microscope (TEM) and X-ray diffraction. The results indicate that the microstructure is primarily composed of non-equiaxed ferrite with martensite/austenite (M/A) constituent dispersed at grain boundaries for the specimens with different finish rolling temperatures. With a decrease in the finish rolling temperature, the yield strength increases, following a significant increase in the grain refinement strengthening contribution and dislocation strengthening contribution, although the precipitation strengthening contribution decreases. The increasing yield ratio (YR) shows that the strain hardening capacity declines as a result of the microstructure evolution when decreasing the finish rolling temperature.

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“…Q&P has also been considered in a hot stamping context related to the application of press hardened steels, [29] and recent experimental results are encouraging. [30] The Q&P concept evolved out of observations that martensitic steels were sometimes found to contain retained austenite in amounts greater than expected, with the additional austenite stabilization hypothesized to arise from partitioning of carbon from supersaturated martensite. The Q&P process was conceived to use and control this behavior.…”

Section: Quenching and Partitioning: Backgroundmentioning

confidence: 99%

Analysis of Microstructure Evolution in Quenching and Partitioning Automotive Sheet Steel

Speer

Moor

Findley

et al. 2011

Metall Mater Trans A

243

105

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Extensive research efforts are underway globally to develop new steel microstructure concepts for high-strength sheet products, driven largely by the need for lightweight automotive structures in support of designs to enhance occupant safety and energy efficiency. One promising approach, involving the quenching and partitioning (Q&P) process, was introduced in the predecessor to this paper series, Austenite Formation and Decomposition, 2003.[1] Development of the Q&P process has continued through to the present, and the current status is highlighted in this article, along with some alternative approaches that are also receiving attention. Special emphasis is placed on the synthesis and interpretation of the fundamental phase transformation responses, perspectives related to alloying and processing, and the resulting microstructure and properties. Key mechanistic issues are discussed, including carbide formation and suppression, migration of the martensite/austenite interface, carbon partitioning, and partitioning kinetics.

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Enhanced mechanical properties of a hot stamped advanced high-strength steel treated by quenching and partitioning process

Cited by 153 publications

References 14 publications

Critical Assessment 7: Quenching and partitioning

Critical Assessment 7: Quenching and partitioning

Effect of Finish Rolling Temperature on the Microstructure and Tensile Properties of Nb–Ti Microalloyed X90 Pipeline Steel

Analysis of Microstructure Evolution in Quenching and Partitioning Automotive Sheet Steel

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