Toughness and microstructural factors of Ti6Al4V alloy

Niinomi, Mitsuo; Kobayashi, Toshirô; Sasaki, Naruo

doi:10.1016/0025-5416(88)90238-8

Cited by 32 publications

(11 citation statements)

References 14 publications

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“…The research [4] has described the effects of notch-tip radius. The J d value decreases in proportion to the decrease in notch-tip radius, but the J d value tends to be a constant when the notch-tip radius is less than a certain value.…”

Section: Resultsmentioning

confidence: 99%

“…5). The locations of α/β interfaces, primary β boundaries and colony boundaries are advantageous to the nucleation of voids, which may evolve into microcracks in the initiating process and subsequently become propagation channels [4,8]. Otherwise, it can be found that main cracks defect and microcracks end at the boundaries and interfaces (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the value of J-integral should be calculated according to the value of E i . The J-integral value to characterize the dynamic fracture property is described as J d rather than J Id because the specimens do not satisfy the validity criteria of dynamic fracture toughness in plane-strain condition [4].…”

Section: Methodsmentioning

confidence: 99%

“…The obtained value of dynamic fracture toughness K Id or J Id indicates crack growth resistance, which is very different from that evaluated as total absorbed energy (E t , A kv or A ku ). The value of K Id or J Id is worthy to be investigated separately if the crack initiation toughness is used alone when considering damage tolerance [4]. The safe use of titanium alloys where dynamic loading and fracture may occur demands an investigation of the dynamic fracture toughness of TA15ELI alloy.…”

Section: Introductionmentioning

confidence: 99%

“…However, there is no widely acceptable or suitable method to evaluate dynamic fracture toughness. The instrumented impact test is a convenient and low-cost method, which is often utilized for evaluating the dynamic fracture toughness of titanium alloys [4][5][6][7]. The obtained value of dynamic fracture toughness K Id or J Id indicates crack growth resistance, which is very different from that evaluated as total absorbed energy (E t , A kv or A ku ).…”

Section: Introductionmentioning

confidence: 99%

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Dynamic fracture toughness of TA15ELI alloy studied by instrumented impact test

Liu

Hui

et al. 2010

Rare Metals

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The dynamic fracture toughness of TA15ELI alloy with two types of microstructures was studied by instrumented impact test. Charpy specimens with both the 0.2 mm U-notch and the a/W = 0.2 pre-crack were adopted to compare notch sensitivity in the two microstructures. The result shows that the specimen with Widmanstätten microstructure exhibits a better dynamic fracture toughness and lower notch sensitivity than that with lath-like microstructure. Fracture surfaces in the case of the two microstructures are analyzed to have a ductile and brittle mixed feature under dynamic loading. The fracture surface of lath-like microstructure is composed of dimples and tear ridges, while that of Widmanstätten microstructure is covered with rough block-like facets and dimples and tear ridges. The α phase boundaries and α/β interfaces act as locations for void nucleation and crack arrest and deviation. The decrease in width of α phase lamellae leads to the increase in the amount of boundaries and interfaces, which causes the increase in the consumption of impact energy and results in the improvement in dynamic fracture toughness.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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